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Mercedes Benz Air Conditioning Problems – Watch Out For An AC Refrigerant Leak! 

Mercedes Benz Air Conditioning Problems – Watch Out For An AC Refrigerant Leak! 

Drivers need to know the most common Mercedes Benz air conditioning problems when troubleshooting the AC in their vehicle. By recognizing the common probes, the symptoms, how to reset their Ac system, and troubleshooting tips to get their car blowing cold air again properly to properly get their car blowing cold air again, they can save on repair and replacement costs! 

Auto Repairs Are EXPENSIVE


Five Reasons for the Mercedes Benz Air Conditioning Problems

If you are finding that your car is not cooling down as it should or the air is not at the correct temperature, this is a sign you are experiencing Mercedes Benz air conditioning probes. A failed air conditioning system will usually occur gradually over time providing symptoms that you should notice. Let’s see the most common reasons for the air conditioning problems in your Mercedes.

  • AC Refrigerant Leak

The AC refrigerant is the liquid that travels through your air conditioning system, helping cool off the entire internal mechanism and prevent overheating. AC refrigerant to your air conditioning system is the same as motor oil to your engine.

    • Typically, your car will lose around 15% of the AC refrigerant every year. 
    • However, suppose you find that your car is losing more AC refrigerant. In that case, this is a clear indicator that your Mercedes Benz air conditioning problems are originating from an AC refrigerant leak. 
  • Weak valves, seals, and damaged components, like AC tubes and compressors, can cause a leak in your car that reduces the air conditioning functionality.
  • If you find your AC is no longer blowing cold air, even when placed on the maximum setting, this is an indication that you might be low on AC refrigerant. 
  • If this is the case, you should bring your car to a mechanic so they can look into flushing your AC system and replacing the refrigerant. Hopefully, replacing the old liquid with the new liquid will help solve the Mercedes Benz air conditioning problems. 
  • Compressor Malfunctions

An air conditioning compressor malfunction is one of the main mechanical concerns that can cause Mercedes Benz air conditioning problems. The compressor is one of the most important components of your air condition system, since its main function is to ensure the refrigerant continues to flow and prevent overheating. 

    • The compressor continuously turns on and off throughout its lifespan, ensuring the refrigerant flows at an even rate while the air conditioning system is turned on. Since the air conditioning compressor is constantly in use, it can go through extreme wear and tear through the lifetime of your vehicle. 
  • If you notice the Mercedes Benz air conditioning problems as a result of compressor issues, you will notice certain symptoms in your vehicle:
    • Lack of hot air being released outside
    • Loud noises from inside the air conditioning unit
    • Circuit breaker tripping
    • Air compressor not turning on
    • Leaking around the air conditioning unit
    • Warm air instead of cool air being transferred to the unit
    • Reduced airflow
  • Climate Control Issues

Like other internal systems in your car, like the fuel system and electrical system, any problems with the internal parts requiring a steady stream of power can directly affect your air conditioning. If you find that you are experiencing Mercedes Benz air conditioning problems, the root cause of the concerns can sometimes be traced back to electrical concerns.

  • Electrical issues can impact your air conditioning problems, although they are not as common as refrigerant leak or compressor issues.
  • The three main components that can cause the Mercedes Benz air conditioning problems are the clutch, control module, and pressure switches.
  • Leaking AC Condenser

When figuring out what part is causing your Mercedes Benz air conditioning problems, many car owners find the ac c condenser can cause durability issues. The AC condenser is a crucial part of the system, playing a huge role in cooling the refrigerant that cycles through the tubes and hoses

    • As time goes on, you will find that this condenser can succumb to wear and tear due to prolonged use. Dirt, debris, and other particles can build up inside the condenser.
  • If you let the dirt and debris build inside the system for too long, it can restrict air flow and cause corrosion to reduce the condenser’s functionality. 
    • If the condenser is not working properly, this can cause some of the most common Mercedes Benz air conditioning problems, like the car not blowing cold air. 
  • Cooling Fan Control Unit Malfunctions 

The final cause of the most common Mercedes Benz air conditioning problems is the cooling fan control unit. The cooling fan control unit is a control module that connects the air conditioning fan to the rest of the AC system. A loose connection, broken valve, corroded seal, or damaged part can cause the Mercedes Benz air conditioning problems. 

  • Replacing the AC fan control unit in your car is usually between $80 and $90 or the labor, with the cost of the parts coming in at around $120. 

Mercedes Benz Air Conditioning Reset

Let’s go over the steps of a Mercedes Benz air conditioning reset to keep your vehicle cool during those hot summer months! 

  • Insert the key into the ignition

The first step in learning the Mercedes Benz air conditioning reset is to insert the key into the ignition and turn the ignition cylinder to the 2nd position. This is the furthest position your ignition can go without intentionally cranking the engine to get the car to turn on.

  • Hold the defrost and recirculated air buttons

The second step is to hold the defrost and recirculated air buttons simultaneously. The defrost button has three lines, while the recirculated air button has a photo of a car. Hold the buttons down for at least between 5-10 seconds.

  • With 45-60 seconds for the LED lights to stop flashing. Then turn off the car.
  • Wait one minute and then restart the car engine in your Mercedes.

Troubleshooting the Mercedes Benz air conditioning to reset can help solve some of the most common Mercedes Benz air condition probes you are experiencing. 

Mercedes Benz Air Conditioning Repair

Drivers need to know how much it costs for a Mercedes Benz air condition repair or replacement when trying to fix the most common Mercedes Benz air conditioning problems. If you neglect your refrigerant or freon levels in your air conditioning system, it can cause the AC compressor to become stressed with the extra load.

  • Any extra strain or pressure placed on the compressor will cause this part to breakdown faster, leading to a premature failure of the ac compressor. 
  • Once the air conditioning compressor is damaged beyond repair, needing a Mercedes Benz air conditioning repair or replacement, you need to get an entirely new air condition system.
  • The Mercedes Benz air conditioning repair cost will usually be over $1,000, depending on the parts and labor required for your specific circumstance. 
  • However, when compared to the Mercedes Benz air condition recharge, this price is much costlier. The price of recharge is only around $100 to get your air conditioner working again.

Therefore, as soon as you lose power in your air condition system and notice the vehicle is no longer blowing cold air, you should bring your vehicle to a nearby mechanic or auto body shop so they can troubleshoot the Mercedes Benz air conditioning problems. 

Mercedes Benz Air Conditioning Not Cold

You can take certain steps for troubleshooting your car to diagnose why the Mercedes Benz air conditioning is not cold.

  • Make sure you have the right tools – You will need certain materials or a specific recharge kit that includes a gauge used to test your air condition system for issues.
  • Turn the AC on – ensure the economy button is off when turning on the air conditioning. Set the cooling fans on your climate control’s highest setting, while the temperature selector is at the lowest setting.
  • Check the radiator fans are working – listen and analyze the air condition system to see if the radiator fans are working when the AC is on in the car.
  • Locate the compressor – find the spot where the AC compressor is located in your car to see if the clutch is operating correctly on the compressor. If the clutch is constantly engaging and disengaging, check your refrigerant levels. 
  • Do not overcharge the AC system – overcharging the Ac system can cause Mercedes Benz air conditioning problems since it can cause leaks in the system.
  • Check the fuses – ensure that no fuses have blown that can cause the Mercedes Benz air conditioning problems.
  • Check the clutch – ensure the clutch is working correctly and getting voltage. If the clutch is not operating properly, it can cause the Mercedes Benz air conditioning, not a cold situation. 

How to Turn on AC in Mercedes – Steps

Drivers need to learn how to turn on the AC in Mercedes to fix the Mercedes Benz air conditioning problems. So – how do you use the air conditioning? Air conditions are a crucial component of your car that lets you comfortably sit in your car during hot weather. Without this mechanism working, it can lead to you being unable to drive your vehicle in the summer months. 

 

Luckily, Mercedes Benz has dual-zone automatic climate control to keep passengers in the front and the back sets comfortable during all four seasons. Let’s find out how to turn on the AC in the Mercedes.

  • The climate control is located in the center console where the other electronic control switches are positioned. 
  • The dials on the left and right are used to change the driver and passenger side’s temperature, respectively. The left side corresponds to the driver, where the right side corresponds to the passenger.
  • The temperature setting on the passenger side controls the back of the car and the rear passenger area. The front passenger has the ability to control the temperature in the rear of the car. 
  • The maximum cool button can change the settings to cool the interior of the car as quickly as possible, which is a very helpful feature in the hot summer months. If you need to quickly use the air conditioning after your car has been baking in the sun, using the maximum setting is crucial to making your passengers comfortable.
  • The AC button turns the dehumidifier function on and off. The dehumidifier helps reduce any condensation on the inside of your windows, since there is a temperature discrepancy between the inside of your car and the outside of your vehicle. 
  • The windshield maximum button activates the defrost feature in your vehicle. This means that the air in the car will be directed to the windshield to help clear off any fog and condensation that is on the glass. 
  • The recirculation button is positioned on the passenger side knob – this feature turns off the outside air supply to the interior cabin to keep out any unwanted odors from outside of the vehicle.
  • Next, the rear defrost button turns on the rear windows so drivers can clearly see when reversing. 
  • The big fan button increases the airflow, while the smaller fan button will decrease the airflow in the cabin. 
  • The air distribution button, a person with 2 arrows, lets the driver or passenger choose where the air will be directed. When learning how to turn on AC in Mercedes, it is a crucial step in the process. 
  • The ‘auto’ feature in the car will maintain the climate control at a specific set temperature that the driver or passenger has chosen. When learning how  to turn on AC in Mercedes, the automatic climate control lets you choose the temperature for the vehicle’s entire interior. 
  • The ‘off’ button will turn the climate control feature off. If you're-press the climate control button in your Mercedes, it will restart the system and choose the default settings. 

The Bottom Line

Drivers need to be aware of the most common and serious Mercedes Benz air conditioning problems when trying to fix the AC in their vehicle. Analyzing the AC system functions, and looking out for any durability or longevity concerns, can help drivers avoid replacements and keep the repair costs as low as possible!