What causes the ASR light to come on on a Mercedes 500SL?

Everything pointed to the Electronic Accelerator Actuator (that checked out okay as well). After discussing the past few months with the car, we established that my problem was moisture in the R25 sensor (throttle positioning sensor) causing the ASR light to come on and the engine to go into the LH mode.

What was the problem with the ASR on my 1992 500SL?

I started having a problem with the ASR system on a 1992 500SL. I was driving on the highway when the ASR sensor light came on and the car defaulted to a “limp home mode”: The engine output power was reduced and I was able to make almost home; after stopping at a red light the battery light came on and the car completely stalled.

Is there a problem with the ASR on a Mercedes?

I guess that if you own a Mercedes, you will at some time get that problem! The ASR problem seems to occur in two distinct ways: It can occur while driving and gives the driver quite a start! The car goes into the LH mode (will be described later) and the accelerator pedal does not respond as before. It’s quite a ‘trip’ to drive the car.

What happens when the ASR light comes on?

I was driving on the highway when the ASR sensor light came on and the car defaulted to a “limp home mode”: The engine output power was reduced and I was able to make almost home; after stopping at a red light the battery light came on and the car completely stalled. I restarted the car and the ASR light was off and the car drove normally home.

Is there an ASR problem on my S500?

All readings ok: 120 ohms across the bus and continuity to all modules on the bus. After re installing the modules, which had all cooled down, the car was started, NO ASR lamp. Ran perfectly. Drove it for about 20 minutes, parked it in the sun (yesterday in SD, it was 95degs).

Why does the ASR light go off when I stop the car?

2) The ASR light comes on, tachometer indicates 1000 rpm but can drive the car even though it’s in the Limp-Home (L-H) mode. 3) If the ASR is on, drive for 5 minutes or so, stop, re-cycling the ignition and the ASR light will go off and STAY off until I stop the car and let the heat build up in the engine compartment.

What’s the problem with my Mercedes W140 S500?

Hi There,I have a Mercedes 1995 W140 S500. Here’s the problem. When the ASR light comes on the car stalls and it seems as if the engine has cut out. When I depress the accelerator the engine comes back to life and the car starts to move very slowly.

What are the symptoms of a bad accelerator pedal?

Symptoms of a Bad or Failing Throttle/Accelerator Pedal Position Sensor. Common signs of a faulty pedal position sensor include inconsistent engine response, reduced fuel efficiency, and the Check Engine Light coming on. The days of having to constantly adjust the throttle cable due to a loose nut on the carburetor are long gone.

How does the accelerator pedal work in a car?

Today’s modern cars, trucks, and SUVs are all equipped with an electronic throttle control system that contains an accelerator pedal position (APP) sensor. This sensor’s primary job is to monitor the position of the throttle pedal and send an electronic signal to open the throttle body as you depress the gas pedal.

What do I need to troubleshoot my Mercedes Benz?

Troubleshooting fuel related problems is not very difficult and you can check the fuel pressure yourself. Checking the fuel pressure is very simple. For this test, you will need a fuel pressure gauge. What you need is a fuel pressure gauge with Schrader valve adapter.

Is the Mercedes Benz 500 SEL lighter than the 450SEL?

The 500SEL which we tried is actually 11 cm. longer than its predecessor, the 450SEL, but thanks to painstaking research and extensive use of high tensile sheet steel and light alloys, it has a 14% lower drag coefficient and is appreciably lighter than the car it replaces.

How does the gas pedal work on a Mercedes?

Since 2000 Mercedes has been using drive by wire system. Which means you press the gas pedal but there is no cable connected directly to the throttle valve. Instead, there is a potentiometer that detects the position of the gas pedal.

When does the ESP light turn on in a Mercedes?

To check, try stopping and restarting the engine. If the light remains on after restarting get it checked at a garage as the ESP system is an important safety feature. If you have a diesel Mercedes, this light will turn on when the engine is warming up.

What does ABS Bas ASR light on Mercedes mean?

What do ABS BAS ASR lights mean? If any of these lights turns on and stay ON once you start to drive the car it means there is a problem with one of the following systems or related sensors. Step 1: Ensure that the main battery on your Mercedes-Benz is holding a proper charge. Mercedes-Benz cars are very sensitive to low voltage.

Why does my Mercedes Benz ABS light keep coming on?

If any of these lights turns on and stay ON once you start to drive the car it means there is a problem with one of the following systems or related sensors. Step 1: Ensure that the main battery on your Mercedes-Benz is holding a proper charge. Mercedes-Benz cars are very sensitive to low voltage.

What are the common problems with a Mercedes SL500?

• Oil leaks from the oil level sensor are common. • The crankshaft position sensors tend to fail. Exhaust & Emissions No common problems reported. Electrical & Lights • Brake light switch failure can cause the ESP and BAS warnings to illuminate.

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