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Need Help, my ASR light recently came on. I got in my car yesterday to leave and it would hardly move. It will crank and go into gear but when the gas paddle is pushed it wont engage unless the paddle is pushed all the way to the floor. I noticed the ASR light on. I have tried unplugging the battery but still the same. After I turn it off and crank it again, the light isn't on. I can push the brake paddle and nothing comes on but when I push the gas paddle it comes on. My mechanic says it needs an electronic throttle pedal control unit for $1,200. Is there any way to over ride this problem to save the money?

 

if your E class is 97 or newer than yes the problem is your throttle position sensor, i think the part is no more than $200. and the labor 2 hours max with some diagnosis time too. easy repair if you do it yourself.

 

Vehicle age, mileage?
Control modules don't just go down although it is a (expensive and unlikely) possibility.

I would carefully inspect and unplug/replug the various components in the electronic (fly by wire) throttle pedal system + get the dealer to do a STAR diagnosis check if you find nothing / don't fix it.

Least expensive part of the system is likely the throttle Position Sensor TPS so if you skip the STAR then thats the sensible place to start rather than the Throttle Pedal or Module.

TPS and TP both are partly mechanical (they sense movement) so wear can cause failure unlike the system module (fully electronic)

Good luck,

Stuart

 

It is a 1994 e320 and has around 176,000 miles on it.

 

TPS and TP both are partly mechanical (they sense movement) so wear can cause failure unlike the system module (fully electronic)

At 176k miles it is likely the TPS or if not the Throttle Pedal.

Note: Should you decide to do some electronic trouble shooting on the Throttle Pedal engine revs are limited to 4000RPM if the car is stationary as a Safety Feature.

Stuart