How to troubleshoot your Mercedes medic air conditioner?

Turn the A/C ON. If you have an Economy button make sure that is off. Make sure fan is on HIGH, temperature selector is turned all the way to COLD, and that the A/C and recirculate light indicators are on. Set the temperature to cold, the lowest setting. Set the cooling fans on high on the climate control.

What kind of air conditioner does a Mercedes Benz have?

The A/C system on your Mercedes-Benz includes many sensors and components including the air conditioner compressor. The A/C compressor is the heart of the system. One crucial element of the A/C compressor is the clutch. It is important to understand how to check if the A/C compressor is engaging or not.

How to troubleshoot your car’s air conditioner problems?

Check to see that the cooling fans on radiator are running when the air conditioning is on. Most cars are designed to have the radiator cooling fan kick in when the A/C is on. Check the compressor has engaged. Identify the location of your compressor. Look at the pullyer and you should be able to see if it spining or not.

What should the air pressure be in a Mercedes Benz?

With the car off the pressure readings should be about the same as ambient temp. in degrees F. If the outside temp is say 80 degrees F, then the pressures on both gauges should be around 80 psi. If the pressures are ok, the compressor should kick on when a/c is requested. If the compressor does not come on, then there is an electrical concern.

How does Mercedes Benz air conditioner system work?

While the pictures on this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. How the A/C System Works. A/C compressor not engaging.

What to do if your air conditioner is low on refrigerant?

The center part of the A/C pulley only engages when the A/C is on. If the clutch is engaging and disengaging rapidly, the refrigerant may be low. Locate the Low Pressure A/C recharge port. Attach the hose from the A/C Recharge Kit and check the pressure.

What is the fault code on Mercedes ML?

I scanned the ML with my new Autel DiagLink scanner and it reported the following fault codes: 5101 L6/1 (left front speed sensor) : Carry out visual inspection. CURRENT 5102 L6/1 (left front speed sensor) : Check wheel bearing (s). CURRENT 5103 L6/1 (left front speed sensor) : Carry out visual inspection.

What is the fault code for a Mercedes fuel temperature sensor?

P0185 Fuel Temperature Sensor B Circuit Malfunction P0186 Fuel Temperature Sensor B Circuit Range/Performance P0187 Fuel Temperature Sensor B Circuit Low Input P0188 Fuel Temperature Sensor B Circuit High Input P0189 Fuel Temperature Sensor B Circuit Intermittent

What causes auto lamp function inoperative in Mercedes?

In case of an emergency To get your Mercedes started manually, grab the Start/Stop button and pull it … You get into the car and start your Mercedes-Benz. Next, you are greeted with “Auto Lamp Function Inoperative” error message on the dashboard. This problem is most often caused due to Mercedes-Benz light sensor malfunction.

How to troubleshoot Mercedes Benz air suspension problems?

Learn how to troubleshoot Mercedes-Benz Air Suspension Problems. You decide to buy a Mercedes-Benz, maybe an S-Class, CLS-Class, R-Class, CL-Class or E-Class. One day you hear of other Mercedes-Benz owners having suspension problems. The next day you start having air suspension problems yourself.

Where is the level sensor on Mercedes Benz air suspension?

If you need help with troubleshooting the airmatic valve assembly watch this video. Level sensor is faulty They are located at the rear and front suspension. When they stop working the air suspension control unit may no longer be able to recognize the height of the car.

What to do if there is no power to the air suspension pump?

If there is no power going to the air suspension compressor, check the air suspension fuse and relay. Here is a picture that shows no power to the air suspension pump. The next step would be to use a professional diagnostic scanner such as the iCarsoft MB II to check the fault codes for the Air Suspension Control Unit.

What are the warning signs of air suspension failure?

First, let’s look at some of the warning signs and symptoms of airmatic suspension problems. On the instrument cluster you will get two messages. The first is the Air Suspension Failure, Visit Workshop, and the second is more critical offten shown in red: STOP VEHICLE TOO LOW. “AIRMATIC VISIT WORKSHOP!” message on the instrument cluster.

Why does my Mercedes Benz make a clicking noise?

It requires electrical power to crank the engine. The car makes a clicking noise but won’t start. Hint: Starter Problem or Low Battery This may seem obvious, but an old battery is the root of many headaches and can cause all sorts of malfunctions on Mercedes-Benz cars.

What happens when a Mercedes Benz goes into limp mode?

When a Mercedes-Benz goes into limp mode, it only operates in second gear and reverse only. When you put it in gear, you may also feel a bang as transmission engages. The first thing you should try is to check the transmission fluid level. The transmission has a dipstick tube but with no dipstick in it.

How do you reset the AC system on a Mercedes?

Hold these buttons down for about five to 10 seconds, or until the LED lights on both buttons start flashing. Wait 45 to 60 seconds for the LED lights to stop flashing. Then turn off the car. Wait 60 seconds and then start the car engine again.

What should I do if my Mercedes engine stops working?

Be aware that if you reset the unit and it again stops working, you need to take the vehicle in to the dealership for repairs. Insert the key into the Mercedes ignition and turn the ignition cylinder to the “2” position.

What does a / C compressor do in Mercedes Benz?

Being the heart of the entire system, the A/C compressor’s role is to add pressure by taking the refrigerant and compressing it. Thus, it is important to understand how to check if the A/C compressor is engaging or not so as to avoid exorbitant fees for Mercedes Benz repair Laguna Niguel. First, we make sure we have the right tools.

Why does my Mercedes air conditioner keep blowing hot air?

In many models, the AC keeps blowing hot air even after recharging the coolant. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. A Mercedes air conditioning reset is a possible solution. Do you know how to do it? Is there any other way to fix the glitch?

Why does my Mercedes air conditioner not reset?

If a Mercedes air condition reset does not work, these following reasons could be causing the trouble: When the AC is releasing hot air, the possible reason could be a defect in the damper. The component is in charge of the air path that goes into the cabin. Check the onboard computer if it can verify the damper’s position.

How to reset a Mercedes air conditioning system from Japan?

To be on the safe side, hold them until their LED lights start flashing. Step 3: Wait for about a minute for the LED lights to stop flashing. When they do, turn the car off. Wait one more minute before restarting the engine. The AC system is reset now and the hot air blowing problem is likely to be solved.

What to do if your Mercedes convertible top is blown?

If it is blown, replace it with a new fuse with the same ampere rating. Check the convertible top relay as well. Swap it with a known working relay that is identical. You can also bridge the top relay for a couple of seconds to see if the hydraulic pump start to run. Replace the convertible top relay if necessary, PN 0025421319.

What causes a Mercedes Benz car to overheat?

The radiator cap is designed to hold 1 bar (1 atmosphere at sea level, or 14.7 lbs per square inch). A failing radiator cap, or a leaking coolant overflow tank can cause coolant loss and overheating. Auxiliary water pump: Models after 1977 have this.

What is the recirculated air button on a Mercedes?

This is as far as the cylinder will go without cranking the engine. Press and hold the defrost and recirculated air buttons simultaneously. The defrost button has three lines going through it, while the recirculated air button has a picture of a car with a curved line through it.

How do you replace a Benz E320 E430 battery?

Remove the negative battery terminal using a 10 mm wrench. Remove the positive battery cable from the battery post terminal. Remove the 13 mm bolt that hold the battery in place. Once the bolt is removed the battery comes right out. Be careful to not injure yourself, these batteries are heavy.

What’s the process for resetting a Mercedes air conditioner?

Sometimes, the process is called a Mercedes climate control reset. The reset procedure is similar no matter whatever you call it. However, if the AC shows any trouble after resetting, you have to take it to a servicing shop or the dealership for a permanent fix. Resetting the AC is a simple task.

What do you call a Mercedes climate control reset?

What kind of refrigerant do you use on a Mercedes?

Or if you know you have a seal proof system or don’t like the idea of adding these additives into the expensive Mercedes-Benz A/C climate control system, then adding pure R134a or just one with only added oil will be the safest way to go. Recommended R134 A/C refrigerant kits for aircon refill?

How do you recharge a Mercedes Benz air conditioner?

Turn the engine on and let it idle. Turn the air conditioner ON and set it to the maximum cooling setting. Open the hood of your VEHICLE and locate the low-pressure AC service port and remove the cap. Attach the refrigerant gauge to the service port.

While the pictures on this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. How the A/C System Works. A/C compressor not engaging.

Why does my AC blow hot air but not cold air?

The reading for this sensor… sensor 05 for my 1998 C280 was 159 with the car running for 10 min and 158 without starting the car in the morning after a night with outside temp 80. The problem I have is that ac blows hot/warm/outside temp air initially, then it blows cold air for 1 or 2 min then it blows outside air.

Why does my Mercedes E320 AC not reset?

For example, if you want to know about Mercedes E320 AC reset, it is better to check the manual and follow the manufacturer’s recommendations. If a Mercedes air condition reset does not work, these following reasons could be causing the trouble: When the AC is releasing hot air, the possible reason could be a defect in the damper.

How to troubleshoot your Mercedes Benz air conditioner?

Identify the location of your compressor. Look at the pullyer and you should be able to see if it spining or not. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is engaging on the compressor. The pulley spins any time the engine is running. The center part of the A/C pulley only engages when the A/C is on.

Can a person fix a Mercedes Benz ML320?

Mercedes Benz ML320 AC Fix and Repair ANYONE can do it! – YouTube Mercedes Benz ML320 AC Fix and Repair ANYONE can do it! If playback doesn’t begin shortly, try restarting your device.

How does the defrost button on a Mercedes work?

The defrost button has three lines going through it, while the recirculated air button has a picture of a car with a curved line through it. Hold these buttons down for about five to 10 seconds, or until the LED lights on both buttons start flashing. Wait 45 to 60 seconds for the LED lights to stop flashing. Then turn off the car.

Can a Mercedes-Benz W212 AWD be replaced?

Our Mercedes-Benz E-Class W212 2010-2016 NEW Rear Right Air Spring Bag will replace the original Rear Right Air Spring; it comes with necessary O-Rings, Voss Fitting and Clip to complete the replacement. Suspension Air Spring Bag failure is usually…

How to repair Mercedes-Benz W212 front air suspension?

Our Mercedes-Benz E-Class W212 2010-2016 Front Strut Air Suspension Line Hose Bracket And Fittings Repair Kit Repair Kit will repair your broken or damaged Suspension Air line hose between the Front Air Strut and the Outer Connection to Engine… Mercedes-Benz E-Class W212 2010-2016 NEW Air Suspension Compressor Relay comes ready for install.

What can I do with my Mercedes Benz?

Your Mercedes-Benz and your iPhone® unite to bring you a unique interface, apps and voice control. Click here to launch video in a pop-up. Learn about the fuel-saving benefits of the automatic ECO Start/Stop system. Click here to launch video in a pop-up. KEYLESS-GO lets you lock and unlock your car without the key leaving your pocket.

What do you need to know about Mercedes Benz ECO start?

Learn about the fuel-saving benefits of the automatic ECO Start/Stop system. Click here to launch video in a pop-up. KEYLESS-GO lets you lock and unlock your car without the key leaving your pocket. Click here to launch video in a pop-up.

What is the temp sensor on a Mercedes medic?

30 = left rear air conditioning heat exchanger temp sensor (not all vehicles; obviously) 40 = control module version software status (?) 43 = variant code second number.

How to remove DTCs from Mercedes A / C air conditioner?

1) After display window shows “En° d”, press AUTO push button once again. Display window should show “dE L” (delete). 2) To erase DTCs, simultaneously press down and up arrow push buttons for more than 5 seconds. The display window should show “- –“. If not erasing DTCs, press the AUTO push button. The permanent DTCs will again be displayed.

Why is my Mercedes-Benz E320 AC not working?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my Mercedes-Benz E320 has air conditioning problems?

What kind of control unit does a Mercedes W210 have?

AC control unit Tank vent valve, camshaft adjuster, exhaust gus recirculation valve, variable resonance manifold valve, 02 sensor heater relay, preglow time-limit relay, kick-down relay/elec. trans. ctrl. kick-down valve, 2nd driving program valve, headlamp range control module

How many miles should a Mercedes Benz be serviced?

Here is the list of the recommended services / checks as suggested by the Mercedes Benz. Service at 10,000 miles /16,000 km or 1 year. Service at 20,000 miles / 32,000 km or 2 year.

Can a Mercedes Benz be driven in the United States?

This Mercedes Benz was driven for a long time without any care. Not only did the previous owner put their lives to risk but also that of other people on the road. Yes, this car was driven in United States. Here is the list of the recommended services / checks as suggested by the Mercedes Benz.

Where is the faulty sounder on Mercedes C Class W203?

The first thing to do is locate and remove the faulty sounder. On the C Class (W203) it is located behind the plastic protection panel under the left hand (near side UK) front wheel arch. Simply remove the road wheel, remove the five plastic 10mm nuts and remaining fixings that secure the inner protection panel.

What are the problems with a Mercedes Benz?

Top 5 Mercedes-Benz no start problems 1 Engine Click, No Start 2 Engine Dies Right After It Starts 3 Car turns over, but it won’t start 4 The car makes a clicking noise but won’t start. Hint: Starter Problem or Low Battery 5 Key will not turn the ignition More

Can you erase a fault code on a Mercedes Benz?

Can clear fault codes. Can read and erase all fault codes on Mercedes-Benz cars. Only works on MB but can perform further troubleshooting including SBC brake systems, convertible systems, Air Conditioner (A/C) system. 3. Mercedes-Benz Star Diagnostic DAS This is diagnostic scanner used at Mercedes-Benz dealerships.

Where is the ECU on a Mercedes Benz?

The ECU is located under the plastic cover up in the passenger corner nearest the windshield under the hood. As far as tuning, do you mean ECU tuning or just tuning in general? I can’t really recommend any ECU tuning places right now but there a few out there. As far as other tuning mods you can always….actually, I’ll stop myself right there.

Why is my air conditioning not working on my Mercedes ML320?

What are common reasons my Mercedes-Benz ML320 has air conditioning problems? While there are a variety of reasons your Mercedes-Benz ML320 air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

How to recharge air conditioner ML320 W163 1998?

Open the hood of your ML320 W163 and locate the low-pressure AC service port and remove the cap. Attach the refrigerant gauge to the service port. You will need to press and hold the quick-release at the end of the hose, insert it on the AC charging port then release it. Read the pressure in your air conditioner system.

Where is the charging port on an ML W163?

Where is the A/C charging port located? The A/C charging port on your ML W163 is located on the passenger side of the firewall. Look near the battery and the coolant expansion tank. You will see the A/C line and the black plastic cap on top of the A/C low-pressure line port.

What to do if your Mercedes AC unit stops working?

How does Mercedes lowers the drops when parked?

Mercedes lowers drops on rear or front. When the car is parked the airmatic will try to level the car. It does this by discharging air from the airmatic suspension strut that is too high. Typically the car is leveled by lowering the one or two corners of the car that are too high.

What was the fatal flaw of the Mercedes Benz Sprinter?

This article is being written to warn potential buyers of this vehicle of the fatal flaw hidden in each of these vehicles. Prior to 2008, when the United States Government mandated diesel exhaust regulations, the Sprinter, manufactured by Mercedes Benz and sold as a Dodge was a real workhorse.

How does Mercedes air suspension work when parked?

It does this so that the one corner of the car is not sitting too low or too high compared to the rest of the car. When the level sensors are damaged they can throw off the calibration procedure. The vehicle can’t level itself, and it continues releasing air from via the pressure release valve.

Why does my C180 Komp keep misfire codes?

With the surging you have it could also be something less sinister – there is a breather hose tucked under the air filter housing that is prone to splitting, this can cause misfire codes too & if split would need replacing.

Why is my 2005 C180 shaking at idle?

Had codes p0306 and p0300, replaced mass air flow sensor, no help.Car runs fine at idle, but when almost hits rev limiter starts skipping and cutting back.Fuel pressure holds,chang … read more I have a 2005 C180 – I just took the vehicle out to the shops and noticed the engine was shaking the car at idle and the revs were not totally steady.

Is there a problem with the Mercedes cooling fan?

Check the mass airflow sensor first. If it checks good then more than likely the ecm will have to be replaced. Loading…

Why is the clutch not engaged on my Mercedes?

Remember that the A/C clutch is controlled by the A/C Control Unit. If that unit detects an error it will not engage the A/C compressor to avoid it getting damaged. One other reason why the A/C compressor does not engage is the fact that the system may be low on R134 refrigerant.

Which is the best a / C compressor clutch for Mercedes?

A/C PRO ACP-100 Professional Formula R-134a Ultra Synthetic Air Conditioning Refrigerant with Reusable Dispenser and Gauge – 20 oz We like the fact that this kit has a gauge for the outside temperature adjustment, so that you can now the exact pressure range you need to be on. Where to buy A/C compressor Clutch for Mercedes-Benz?

Can a Mercedes Benz e300td CLK320 be changed?

Changing the cabin air filter in your CLK-Class is literally a snap with our handy replacement guide. Everything you need to know to replace the fuel injectors in your CLK320 is outlined in this technical article. The fuel sending unit in your E300D can sometimes fail, but do not fret!

Which is the defrost position on a Mercedes Benz?

Usually, the default, no vacuum position is the defrost position. My guess would be it’s the vac reservoir that was described previously. I just repaired my center vent problem this weekend and what a PITA it was. Zade Faraj’s link With this post helped me start off.

Where is the climate control on a Mercedes Benz?

And another thing, the cabin temperature sensor for climate control is located in the cabin light, on roof, my started to make irritating noise from age, so I took that appart, there is a motor (fan, it’s tiny) I removed it, and assembled sensor back, it works without that fan, it just reacts to changes in temperature quicker.

How does the cold start valve work in a Mercedes Benz?

When the cold start valve opens, the pressure above the control plunger is reduced. This also enriches the mixture from the main fuel injectors because the plunger can move farther for the same air flow, allowing the air flow plate to displace farther, and allowing more fuel to flow from the main injectors for the same airflow.

How to know if your Mercedes Benz has an AC problem?

Start the car and turn on the AC. (make sure the EC button it off!) Press and hold the REST button for 5 seconds or so. The display will change from your temperature settings to a diagnostic mode The number on the left is the sensor ID and the number on the right is the value. Use the left and right “Auto” buttons to cycle through the sensors.

How do you defrost a Mercedes Benz without cranking the engine?

Insert the key into the Mercedes ignition and turn the ignition cylinder to the “2” position. This is as far as the cylinder will go without cranking the engine. Press and hold the defrost and recirculated air buttons simultaneously.

What should I do if my Mercedes Benz won’t start?

Start the car and you should be able to get around 60 psi. When the engine is running and when you turn off the engine the pressure should stay steady. Always perform this test on a cold engine. Next, make sure that the fuel injector connections are secure and not loose. Check the fuel pump and the fuel pump relay.

Are there any problems with the Mercedes engine?

Theses engines were more powerful and more fuel efficient. They did have a few teething problems but have proven to be very durable as long as they are treated and maintained properly. A true challenge – but you can do it with the right knowledge.

Are there any problems with a Mercedes vacuum pump?

Typical Mercedes diesel vacuum pump. They are very reliable and easy to rebuild if need be. The most common failure is the check valve and internal diaphragm. The very first thing I do is make sure we have a constant supply of vacuum.

Why is my dashpot not working on my Mercedes vacuum?

Because the dashpot is being supplied by the 3 way connector and that is connected to the metering valve in the supply line. The metering valve is designed to restrict the vacuum going to this area. Replace the dashpot and the connector if necessary. Next we turn out attention to the big culprits to vacuum leaks.

Where is the leak on a Mercedes vacuum?

Another area of great leakage is the metering valves on the main supply line. There is a 3 way and 4 way connector on the valve. Be very careful removing the 2 connectors from the supply line metering valve. The nipples are small and very fragile and prone to cracking.

Why does my air conditioner spin when the engine is running?

The pulley spins any time the engine is running. The center part of the A/C pulley only engages when the A/C is on. If the clutch is engaging and disengaging rapidly, the refrigerant may be low. Locate the Low Pressure A/C recharge port.

How can I charge my Mercedes ML320 air conditioner?

You will need to press and hold the quick-release at the end of the hose, insert it on the AC charging port then release it. Read the pressure in your air conditioner system. If the pressure is low the gauge reading will be in the white zone.

How to recharge ML320 W163 1998-2005?

How to recharge the Air Conditioner (A/C) system of your ML-Class W163. Turn the engine on and let it idle. Turn the air conditioner ON and set it to the maximum cold setting. Open the hood of your ML320 W163 and locate the low-pressure AC service port and remove the cap. Attach the refrigerant gauge to the service port.

Why is my a / C compressor not working on my Mercedes?

One other reason why the A/C compressor does not engage is the fact that the system may be low on R134 refrigerant. Typically older cars may have very slow leaks that may require top off with refrigerant every couple of years. You can use a R134a recharge kit to recharge your system if the A/C compressor is not working.

Why is my ML320 blowing hot air even when the AC is on cold?

Is your ML blowing hot air even though you have the AC on cold setting? A common problem with the ML320 / ML430 is the AC getting stuck on Hot or Cold setting. This is caused by the blend motor flap getting stuck and no longer moving when you rotate the AC knob between Hot and Cold.

Where is the flap on the ML320 ml430?

Open the glove box and you will see the four screws that hold it in place. Once you remove the screws pull out the glove box. Behind the glove box (on the left) you will see a white plastic arm. This is the flap that switches the air flow from hot to cold. It gets stuck in HOT position.

Why does my Blend motor not move when I Turn on the AC?

This is caused by the blend motor flap getting stuck and no longer moving when you rotate the AC knob between Hot and Cold. You can manually switch the blend motor flap if you remove the glove box.

How much does it cost to diagnose Mercedes A / C system?

A Mercedes-Benz specialized shop may charge you between $100-$150 to diagnose your A/C system. Ensure the system is sealed and not leaking. Ensure the system does not have any moisture or air in it. An A/C vacuum pump is needed to achieving this. Ensure the compressor is operating correctly.

What is the code for Mercedes Benz air conditioning?

Also make note of the recharged bar pressure (17) – you can periodically check code 7 to make sure the system is holding the refrigerant pressure – if it decreases over time you have a slow leak and need to address it. Hope this helps and good luck! 2001 E55, 1999 C43. thanks!

Why does my GMC air conditioner not shut off?

The air conditioner fan on a 2003 Denali fitted with auto GMC climate control will not shut off even with the ignition off and the key out. What is the reason and what can be done to fix it? GMC has issued a recall for fans that will not shut off.

Why does my air conditioner turn off after 15 minutes?

If there’s something wrong with your AC that makes it shut off after just 15 minutes, it’s usually one of these issues: Unit is overheating. This often means there is simply a buildup of grime inside the compressor unit, but it could also mean there’s a refrigerant leak or have other causes. Faulty thermostat.

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