The 1999 Mercedes E320 AC compressor may not be working due to a faulty compressor, low refrigerant levels, a malfunctioning pressure switch, or electrical issues. It is recommended to have a qualified technician diagnose the problem to determine the exact cause and provide the necessary repairs.

Are you the proud owner of a 1999 Mercedes E320, a car that exudes elegance and sophistication? As an enthusiast, you take pride in maintaining your vehicle’s peak performance, but what happens when your AC compressor stops working? It can be frustrating and uncomfortable, especially during those scorching summer months. Fear not, for this blog article is here to help you troubleshoot and resolve this issue.

Whether you are a seasoned mechanic or a DIY enthusiast, this guide is tailored to your needs. We understand that you possess a moderate to advanced knowledge of car mechanics and have likely worked on your own vehicle before.

Now, let’s delve into the heart of the matter – a malfunctioning AC compressor in your treasured 1999 Mercedes E320. Why is your AC compressor not working? There could be various factors at play, such as wear and tear, electrical issues, or refrigerant leaks. This article will explore these possibilities and provide you with step-by-step instructions on how to diagnose and resolve the problem.

But that’s not all. In addition to troubleshooting tips, we will also share valuable insights on preventive maintenance and care to ensure your AC compressor remains in optimal condition. So, if you’re tired of sweating through your drives and want to regain the cool comfort of your Mercedes E320’s AC system, keep reading.

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Bestseller No. 1

HinLIaDa A/C AC Compressor With Clutch, For Mercedes-Benz E320/ML320 3.2L 1996 1997 1998 1999 2000 2001 2002 Air Conditioner Compressor & A/C Clutch Perfectly Match The Auto Parts Of The Original Car

【100% Brand New】High quality- tested to meet or exceed OEM specifications. It could correctly replace the original quality part.
【Feature】The air-conditioning compressor can provide enough pressure to increase power and reduce engine load. It greatly improves the cooling function. It has the characteristics of high efficiency, stability, safety and reliability.
【OEM Part Number】CO105111C, 7511631, 7512187, 295067NA, 5839, 5844, 32053
【Fitment】Air Conditioner Compressor W/ Clutch fit For Mercedes-Benz E320/ML320 3.2L 1996 1997 1998 1999 2000 2001 2002, Please Compare With Your Original One Before Purchasing! 100% Brand New and High Quality.
【Note】Before installing the air conditioning compressor pump, be sure to clean your car’s cooling system pipes. If there are debris or metal fragments in the pipes, the service life of the parts may be shortened.

Bestseller No. 2

GDSMOTU AC Compressor with Clutch Fits for Mercedes Benz C220 C230 CLK320 C36 AMG Series E300 1996-2009, for Dodge/Freightliner Sprinter 2500 3500 2.7L 2002-2006, for Chrysler Crossfire 3.2L 2004-2008

[Fitment] — Compressor Clutch for Chrysler Crossfire 3.2L 2004-2008, for Dodge Sprinter 2500 2.7L 2003-2006 for Sprinter 3500 2.7L 2003-2006, for Freightliner Sprinter 2500 2.7L 2002-2006 for Freightliner Sprinter 3500 2.7L 2002-2006, for Mercedes-Benz C220 2.2L 1996 C230 2.3L 1997-2000 C280 2.8L 1996-2000 C36 AMG 3.6L 1996-1997 C43 AMG 4.3L 1998-2000 CL500 5.0L 1998-2000 CLK320 3.2L 1998-2003 CLK430 4.3L 1999-2003 E300 3.0L 1996-1999 E320 3.2L 1996-2002 E420 4.2L 1997 E430 4.3L 1998-2002
[Replace OEM Numbers & Specification] — CO 105111C,1520971, 11105111, 5097010AA, 639307, CS20084, 4710293, 4711293, 77356, 78356, 2041697, 5511631, 6511631, 7511631, 295067NA, 0002302011, 2302011, 32053, 2011112, , 142986C, 2369, 1440N, 21635, 10343180, 10347421, C1942, C2049, 0610045, TEM275638, 275638, DW77356, 3003760 / Oil Type: PAG46 / Pulley Grooves:6 / Pulley Diameter (mm): 119 / Compressor type: SD7SB16C / Internal Oil Content 130ml
[Advantages] — Compressor is mainly made of high-strength aluminum alloy which ensures a long service life. All compressors are pressure tested with nitrogen for leaks to ensure their quality. Our AC compressor kit works efficiently under low noise and tiny vibration to provide you a super cool trip. Driving at a stable speed will help reduce fuel consumption
[Guaranteed quality] — As a high-speed rotating working part, the air conditioning compressor often encounters failures. Common failures are abnormal noise, leakage, and failure to work due to circuit problems. Our air conditioning compressor with clutch meets OE standards and ISO/TS 16949 quality to ensure product quality
[Important Reminder] — Before installing the air conditioning compressor please clean the cooling system pipe of the your car, If sundries or metal shavings in the cooling system pipe make the system stuck, it will cause the compressor kit burn out due to the Large pressure. What’s more, the internal parts are lubricated during production and this item is pre-filled with oil upon delivery; therefore, there is no need to add oil during initial use

Bestseller No. 3

A-Premium HVAC Heater Blower Motor Assembly Compatible with Mercedes-Benz Vehicles – W210 Series E300 1996-1999, E320 1996-2002, E420 1997, E430 1998-2002, E55 AMG 1999-2002, W211 Series E320 2003

[Vehicle Fitment]: Compatible with Mercedes-Benz W210 Series E300 1996-1999, E320 1996-2002, E420 1997(Base), E430 1998-2002, E55 AMG 1999-2002, W211 Series E300 E320 2003(Wagon)—From Chassis # A735001, without Resistor
[Reference Number]: BM9278C, 700170, 2108206842, PM9278, V30031772—You can select the “Year/Make/Model” or other parameters of your car at the top of the list and click “Confirm” before purchasing. Check if this blower is suitable for your car
[Package Contents]: 1x Heater Blower Motor Assembly (Included: Fan Cage); Packaging Type: Box
[Reliable Replacement]: This air conditioner blower motor is made from motor-specific silicon steel and premium enameled copper wire and is manufactured to OE specifications for direct installation without modification. Perfect replacement for old blower motors
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted heater blower motor. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.

Bestseller No. 4

A-Premium Air Conditioner AC Compressor with Clutch Compatible with Mercedes-Benz C-Class C230 C320, CLK-Class CLK320 CLK350, E-Class E300 E350, G-Class G500 G550, S-Class & More

[Specifications]: ①Compressor Type: 7SEU17C/7SEU16C/6SEU16C; ②Oil Type: PAG46; ③R-efrigerant Type: R-134A; ④Pulley Grooves: 6; ⑤Clutch Included: Yes; ⑥Oil Prefilled: 100 ml (10 ml tolerance)
[Vehicle Fitment]: Compatible with Mercedes-Benz C230 2002/2006-2007, C240/C320 2001-2003, C250 2012, C280 2006-2009, C300 2008-2012, C350 2006-2012, C63 AMG 2008-2015, CL500 2006 (To 8/24/06), CL500 2001-2003 (To 09/30/02), CL600/CL55 AMG 2001-2006, CL65 AMG 2005-2006, CLK320 2002-2004, CLK350 2006-2009, CLK430 2002, CLS500 2005-2006, CLS55 AMG 2006, CLS63 AMG 2007-2011, E300 2010, E350 2006-2011/2013-2014, E430 2002, E320/E500/E55 AMG 2002-2006, E63 AMG 2007-2011, G500 2002-2012
[Vehicle Fitment]: Compatible with Mercedes-Benz G55 AMG 2003-2011, G550 2009-2012, GLK300 2011-2012, GLK350 2010-2012, ML320 1998-2003, ML350 2003-2005, ML430 1998-2001, ML500 2002-2005, ML55 AMG 2001-2003, ML63 AMG 2010-2011, R63 AMG 2007, S420 1998, S430 2000-2003, S500 1998-2006, S55 AMG/S600 2001-2006, S65 AMG 2006, SL500 2003-2006, SL55 AMG 2002-2006, SL550 2007-2009/2011-2012, SL600 2007-2008, SLK280 2006-2008, SLK300 2009-2011, SLK350 2005-2011/2013-2015, SL65 AMG 2007-2008
[Reference Number]: 00023-06511, 00023-08011, 00023-08111, 00023-08511, 00023-08811, 00023-09011, CO-11245C, 98394, 97394
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted Air Conditioning Compressor for car. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind

Bestseller No. 5

A-Premium A/C Condenser Replace# 4814, 2108300270 – Compatible with Mercedes-Benz E-Class E300 1995-1997, E320 1996-2002, E420 1997-1997, E430 1998-2002, E55 AMG 1999-2002

[Vehicle Fitment-1]: Compatible with Mercedes-Benz E300 1995-1997, E420 1997-1997 — Fits W210 series only
[Vehicle Fitment-2]: Compatible with Mercedes-Benz E320 1996-2002, E430 1998-2002, E55 AMG 1999-2002 — Fits W210/W211 Series only
[Specification]: ①Built-in Receiver Dryer: No; ②Built-in Bracket: Yes; ③Core Length (IN): 22.375; ④Core Width (IN): 28.82; ⑤Core Thickness (IN): 0.82; ⑥Configuration: Parallel Flow; ⑦Built-in Oil Cooler: No
[Reference Number]: 4814, 2108300270, 2108300570
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted ac condenser assembly. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.

Bestseller No. 6

A-Premium Steel Air Conditioning A/C Receiver Drier Compatible with Mercedes-Benz W210 Series E300 1995-1999, E420 1997, E430 1998-2002, E55 AMG 1999-2002, E320 1996-2002, Black

[Vehicle Fitment]: Compatible with Mercedes-Benz W210 Series E300 1995-1999, , E420 1997, E430 1998-2002, E55 AMG 1999-2002, W210/W211 Series E320 1996-2002
[Reference Number]: 0233704, 19188822, 1411585, 1411768, 1510069, 2108300483, 2108300283, 2071015, 208739, 22134, 233704, 33704, 3713604, 540099, 708114, 88919501, 95184, A2108300483, A2108300283, AD158000S, RD4081C, TEM208739, T33704, V30060042
[Function]: Ensure the dryness and cleanliness of the ac hose, protect the accessories in the system, and reduce wear and corrosion
[Benefits]: A-Premium A/C Receiver Drier is factory sealed to ensure cooling efficiency, reduce fuel consumption, and has insulation performance
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted a/c receiver drier. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind

Bestseller No. 7

Torchbeam AC Compressor with Clutch Fit for Mercedes-Benz E320 1996-2003, ML320 1998-2002, for Chrysler Crossfire 2005-2006 3.2L, for Dodge Sprinter 2500 2003-2006, OE: 6511631, 78356

【RELIABLE AC COMPRESSOR REPLACEMENT】: We conduct strict pressure leak detection tests on AC compressors, promising durable longevity. ①Oil Type: PAG 46; ②Oil Prefilled: Yes; ③Refrigerant Type: R134a; ④Pulley Grooves: 6; ⑤Pulley Diameter: 4.75inch; ⑥Pulley type: Multi-Groove Serpentine; ⑦Clutch Included: Yes; ⑧Noise: Low Noise； ⑨Compressor Model: 7SB16C.
【VEHICLE FITMENT】: A/C Compressor kit Compatible with Mercedes-Benz ML320 1998-2002, SLK230 1998-2001, E320 1996-2003, C220 1996, E55 AMG 1999-2003, CL500 1998-2000, S420 1998-1999, S500 1998-1999, SLK320 2001-2004, Dodge Sprinter 2500 2003-2006, Chrysler Crossfire 2005-2006 3.2L, Please confirm that this compressor will fit your vehicle by using “amazon confirmedfit”.
【PART NUMBER】: A/C Compressor kit replace 6511631, 78356, 142986NEW, 639307, 10000701, 0610045, CS20084, 2011112, 0230701180, A0002302011, 5097010AA, 19193581, 2307011, 000230701188, 0002340911, RX097010AA, 2302011, 0002307011, 5117668AA, 5117665AA, 5117666AA, 000230201160, 000230681188, 000230201180, 5117680AA, 000230681180, 000230701180, 517666AA, 0002302011, 000230681187, 0002306811, 5117679AA, Please review the part number and fitment chart carefully prior to ordering.
【UPGRADED REFRIGERATION】: Our air conditioner compressor with clutch features upgraded cooling technology for superior performance. It ensures your car stays cool and comfortable even in extreme heat, turning every drive into a pleasant experience. Additionally, it comes with a highly effective defogging function for winter, guaranteeing clear visibility and safe driving in cold weather.
【STRONG PERFORMANCE】: Our AC compressor for car is equipped with strong power output, delivering rapid cooling while minimizing energy consumption. Equipped with advanced noise reduction technology, it operates smoothly with low noise, quickly creating a comfortable in-car space.

Bestseller No. 8

PHILTOP 78356 AC Compressor, Air Conditioning Compressor with Clutch for E320 1996-2003, ML320 1998-2002, Crossfire 2004-2008, Sprinter 2500 2003-2006, Sprinter 2500 2002-2006, A/C Compressor for Car

COMPATIBILITY: PHILTOP A/C Compressor compatible with E320 1996-2003, ML320 1998-2002, Sprinter 2500 2003-2006, SLK230 1998-2001, Crossfire 2005-2006 3.2L, CLK320 1998-2002, C230 1997-2000, CLK430 1999-2003, E430 1998-2002, Crossfire 2004 2007-2008, SLK320 2001-2004, C280 1996-2000, ML430 1999-2001, Sprinter 3500 2003-2006, S320 1996-1999, E300 1996-1999, E420 1997, ML500 2002, CLK320 2003 3.2L, E55 AMG 1999-2003, Sprinter 2500 2002-2006, CLK55 AMG 2001-2002
PART NUMBER: AC Compressor replacement to 1520971, 11105111, 5097010AA, 639307, CS20084, 4710293, 4711293, 77356, 78356, 2041697, 5511631, 6511631, 7511631, 295067NA, 0002302011, 2302011, 32053, 2011112, , 142986C, 2369, 1440N, 21635, 10343180, 10347421, C1942, C2049, 0610045, TEM275638, 275638, DW77356, 3003760
PREMIUM ALUMINUM MATERIAL: This ac air compressor is a replacement compressor and clutch. Its main body is made of high-strength aluminum material, which is durable, rigid, and wearable. It will not crack, break, or leak. Such high-quality ensures a long-time use for each compressor kit
STRONG COOLING FUNCTION: The auto ac compressor can provide sufficient pressure, which increases power force and decreases engine load. It dramatically improves the cooling function: features as high and stable efficiency, safety, and reliability
LOW NOISE & LOW FUEL CONSUMPTION: AC compressor works excellent and has low noise with a better experience. With a lower load factor, low power will be input when driving at high speed, which increases fuel economy and makes operation smoothly

Bestseller No. 9

Sunbelt A/C Condenser For 97-02 Mercedes-Benz E320 3.2L 98-02 Mercedes-Benz E430 4.3L 99-02 Mercedes-Benz E55 AMG 5.5L 95-97 Mercedes-Benz E300 3.0L 97 Mercedes-Benz E420 4.2L 4814

[Warranty]: Backed by a Lifetime guarantee
[Design Material]: Built with the highest grade materials and components
[Quality Control]: Each Product is quality inspected and 100% tested
[Fitment]: OE design to ensure exact fit, form and function Carefully crafted to exceptional OE standards for precise fit

Bestseller No. 10

A-Premium Air Conditioner AC Compressor Clutch Kit Compatible with Mercedes-Benz C220, C230, C280, E300, E320, E420 & Chrysler & Dodge Sprinter 2500 & Freightliner Sprinter 3500, 7SB16C Style Only

[Specifications]: ①Compressor Style: 7SB16C; ②Pulley Groove Quantity: 6; ③Pulley Diameter (MM): 125; ④Voltage: 12V
[Vehicle Fitment-1]: Compatible with Chrysler Crossfire 2004-2008; Compatible with Dodge Sprinter 2500/Sprinter 3500 2003-2006; Compatible with Freightliner Sprinter 2500/Sprinter 3500 2002-2006; Compatible with Mercedes-Benz C220 1996, C230 1997-2000, C280 1996-2000, C36 AMG 1996-1997, C43 AMG 1998-2000, CL500 1998-2000, CLK320 2003 V6 3.2L (Convertible), CLK320 1998-2002, CLK430 1999-2003, CLK55 AMG 2001-2002
[Vehicle Fitment-2]: Compatible with Mercedes-Benz E300 1996-1999, E320 1996-2003, E420 1997, E430 1998-2002, E500 2003, E55 AMG 1999-2003, ML320 1998-2002, ML430 1999-2001, ML500 2002, ML55 AMG 2000-2002, S320 1996-1999, S420 1998-1999, S500 1998-1999, S600 1998-1999, SLK230 1998-2001, SLK320 2001, SLK320 2002-2004 V6 3.2L (Naturally Aspirated)
[Package Content]: This Kit Included: 1x Pulley With Bearing, 1x Front Plate, 1x Electromagnetic Coil. Please confirm that this AC Compressor Clutch Kit for car will fit your car by using Amazon’s garage
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted A/C Compressor Clutch Kit. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind

Understanding the AC Compressor

Before we dive into troubleshooting and resolving the issue of a non-functioning AC compressor in your 1999 Mercedes E320, let’s take a moment to understand the role and importance of this component.

The AC compressor plays a crucial role in your car’s air conditioning system. It is responsible for compressing the refrigerant and circulating it through the system, allowing the heat to be drawn out and the cool air to be distributed throughout the cabin. Without a properly functioning AC compressor, you’ll be left with hot and stuffy air, making your drives uncomfortable, especially during those sweltering summer months.

The Possible Culprits

Now that you understand the significance of the AC compressor, let’s explore the potential reasons for its malfunction.

1. Wear and Tear:

Over time, the AC compressor may experience wear and tear due to its constant usage. This can lead to mechanical failures, such as damaged pistons, valves, or bearings, which can prevent the compressor from functioning properly.

2. Electrical Issues:

Electrical problems can also contribute to a non-working AC compressor. Faulty wiring, blown fuses, or a malfunctioning clutch can disrupt the electrical flow and prevent the compressor from engaging.

3. Refrigerant Leaks:

One of the most common causes of AC compressor failure is refrigerant leaks. The refrigerant plays a vital role in the cooling process, and when there’s a leak, it not only affects the compressor’s performance but also puts additional strain on the entire AC system.

Troubleshooting and Resolving the Issue

Now that we’ve explored the possible culprits behind a non-working AC compressor, let’s move on to troubleshooting and resolving the issue.

Step 1: Check for Power

Start by checking if power is reaching your AC compressor. You can do this by using a multimeter to test the electrical connections and ensure that there is a steady flow of electricity.

If there is no power reaching the compressor, you may need to inspect the wiring and connections for any signs of damage or corrosion. Replace any faulty components and ensure that all connections are secure.

Step 2: Inspect the Clutch

The clutch is responsible for engaging and disengaging the AC compressor. If the clutch is not functioning correctly, the compressor won’t turn on.

Inspect the clutch for any signs of damage or wear. Look for frayed or broken wires, worn-out bearings, or a loose clutch plate. If you notice any issues, it’s best to replace the clutch assembly to ensure proper functioning of the compressor.

Step 3: Check for Refrigerant Leaks

As mentioned earlier, refrigerant leaks can cause the AC compressor to malfunction. To check for leaks, you’ll need to use an electronic leak detector or UV dye.

If a leak is detected, you’ll need to locate the source and repair it. Keep in mind that refrigerant leaks should be handled by a professional, as they require specialized equipment and expertise.

Step 4: Test the Pressure

Testing the pressure in your AC system can provide valuable insights into the health of the compressor. Use a manifold gauge set to measure the high and low side pressures.

If the pressure readings are outside the manufacturer’s specified range, it indicates a problem with the compressor or other components in the system. Consult a professional to diagnose the issue and perform any necessary repairs.

Preventive Maintenance and Care

Now that you’ve successfully resolved the issue with your AC compressor, it’s essential to implement preventive maintenance and care practices to ensure its optimal performance in the long run.

Regular Inspections

Regularly inspect your AC system, including the compressor, for any signs of damage or wear. Look out for oil stains, refrigerant leaks, or unusual noises. Timely detection of issues can prevent major failures and costly repairs.

Clean the Condenser

The condenser, located in front of your radiator, plays a crucial role in dissipating heat from the refrigerant. Over time, it can become clogged with dirt, debris, and bugs, hindering its performance. Regularly clean the condenser to optimize its efficiency.

Replace Filters

Dirty or clogged filters can restrict airflow, putting unnecessary strain on the AC system, including the compressor. Replace the cabin air filter and the engine air filter at regular intervals to maintain proper airflow.

Use the AC System Regularly

Refrigerant leaks are often caused by seals drying out and becoming brittle due to inactivity. To prevent this, it’s essential to use your AC system regularly. Even during the cooler months, run the AC for a few minutes every week to keep the seals lubricated and in good condition.

Congratulations! You’ve successfully diagnosed and resolved the issue with your 1999 Mercedes E320’s AC compressor. By following the troubleshooting steps and implementing preventive maintenance practices, you can ensure that your AC system remains in optimal condition, providing you with cool comfort during your drives.

Remember, while DIY repairs can be satisfying, it’s always best to consult a professional for complex issues or if you’re unsure about any aspect of the repair process. Stay cool and enjoy the luxury of your Mercedes E320!

How to diagnose air conditioner A/C

Frequently Asked Questions (FAQ)

Why is the AC compressor in my 1999 Mercedes E320 not working?

Possible reasons for a non-functioning AC compressor in a 1999 Mercedes E320 include low refrigerant levels, a faulty compressor clutch, or electrical issues.

How can I diagnose the issue with the AC compressor in my 1999 Mercedes E320?

It is recommended to have a professional mechanic check the refrigerant levels, visually inspect the compressor clutch, and test the electrical connections to diagnose the problem accurately.

Can I repair the AC compressor in my 1999 Mercedes E320 myself?

AC compressor repairs can be complex and require specialized tools. It is usually best to have a professional handle the repair to ensure it is done correctly.

How much does it cost to replace the AC compressor in a 1999 Mercedes E320?

The cost of replacing an AC compressor in a 1999 Mercedes E320 can vary, but it is typically between $500 and $900, including parts and labor.

Is it necessary to replace the entire AC system if the compressor is faulty?

In most cases, only the faulty AC compressor needs to be replaced. However, it is recommended to have the rest of the system inspected to ensure there are no additional issues.

Final Words: Ensuring the Performance and Longevity of Your AC Compressor in Your 1999 Mercedes E320

In conclusion, understanding the AC compressor and its role in the air conditioning system of your 1999 Mercedes E320 is crucial for troubleshooting and resolving any issues. The possible culprits for a non-working AC compressor include wear and tear, electrical issues, and refrigerant leaks.

To resolve the issue, you can start by checking if power is reaching the compressor and inspecting the clutch for any damage. Checking for refrigerant leaks and testing the pressure in the AC system are also important steps in the troubleshooting process.

Implementing preventive maintenance and care practices can help ensure the optimal performance of your AC compressor in the long run. Regular inspections, cleaning the condenser, replacing filters, and using the AC system regularly are all important steps to maintain the compressor’s functionality. It is important to note that while DIY repairs can be satisfying, it is best to consult a professional for complex issues or if you are unsure about any aspect of the repair process.

By following these steps and taking proper care of your AC compressor, you can enjoy cool comfort during your drives in your 1999 Mercedes E320. Keep cool and enjoy the luxury of your car!

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1999 Mercedes E320 Ac Compressor Not Working: Troubleshooting Guide