E400, idle surging

[psychotuner]

1993 3.2L 300E

Hello guys,

Im trying to help my roomate out, of course I am the guy who works on cars got conned into figuring out what's wrong with his car, however, I know nothing of Mercedes...

Here is the problem from what I know,
#1 Basically the car idle surges up and down up and down.

#2 And there is a problem with the gas pedal, when you mash on the pedal, the car doesnt go anywhere, it doesnt rev up, it just doesnt go. You have to let your foot of the gas and press back down on it till it decides to drive.....

The car does not emmitt any Check engine codes, but the bulb may be popped?
This is not an OBD seres computer system so I do not know how to check for the trouble codes..

Im not sure if these 2 problems are related to one specific malfunction, but this is what I have done so far..

Cleaned the MAF sensor ( or whatever Mercedes calls it) The Sensor on the intake pipe.

I checked the throttle cable and it is not sticking or anything, seems to be functioning properly.

My thoughts are TPS sensor, does it have one? Since I do not detect any throttle bodies...
IACV,does it have one?


I guess my first initial step is to find the trouble codes.

Any help is greatly appriciated!