Throttle Valves May Experience Electrical Failure on Mercedes-Benz S500

Problem Description and Possible Solution

The electronic throttle assembly may suffer an electrical failure. It is often cheaper to send the valve to a service center for repair that to purchase a new part.

Problem Data
RepairPal Verified
Average mileage: (–)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
8 people reported this problem
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Engine light will not stay off.....after computer re-set it stays off for maybe 10 miles. The ASR light appears sporadically, at various speeds and the car goes into LIMP mode. The only way to recover control is to put the car in neutral and turn off the ignition....then re=start vehicle. This presents an "iffy" problem at speed over 40 MPH and mini traffic jams in traffic or at lower speeds. Not to mention putting the automatic transmission back in gear at speed. The ASR problem re occurs at munch longer intervals and is totally unpredictable.