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Why will the car not accelerate. on 1999 Mercedes-Benz E430

E430 will only accelerate to 1000 and 1500 RPMs. On start it revs to 2500 and back to idle. Changed the accelerator pedal sensor. There are no codes stored. The BAS and ESP lights are on. Brake lights work. And it runs smooth not rough.

Asked by for the 1999 Mercedes-Benz E430
POSS THROTTLE POSITION SENSOR IS ALSO BAD. IT WILL DEFAULT TO APPROX 1500 RPM.SUGGEST YOU GET A DIAG TO CONFIRM
The throttle position sensor has already been replaced and it did not fix the problem. 'Got any other ideas?....no codes....where should I start?? Thanks.
I can tell you for sure it is your brake light switch. Let me know if you need the part number
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