Hi there.

First i would like to say GREAT forum you got here.
Im from Denmark so exuse my english is a bit poor "i think"

I was wondering if any one can help me to find the problem with my ASR.
My car is a 1991 W124 300-24 (M104890) "not the 93-96 280/320"

My car is equiped with the great ASR system wich means that the cars accelerator system is elektronical.

I have my ASR error light on in the dash board.
The problem started to be pressent some times but got worse and finaly permanent.
When the ASR light came on i could still drive the car as it was not going in to the famus limp home mode as the later models did like the 280/320
But at the same time the ASr light came on the CC / cruise controle would always go infunktional (not working)
How ever when the error first came i could always just recircling the key (stop and start again) then the ASR light would disappear until next time.

When i look at my engine, i se my gas cable attached to a lot of linkage that is attached to what is discribed as the speed position sensor where also the cable from the automatic gearbox is attached.
But another linkage is going down to the throtle body with some kind og a metal linkage that has a spring inside like some sort of possibility to adjust the throtle without the influence of the position of the speed pedal.
That gives sense because from the throtle body there goes another linkage down under the inlet manifold to an elektric engine that is soposed to manage the throtle bodys opening of the gas.

on pin 14 in my 16 pins diagnostic plug, i got 5 codes read out

4 = CC switch (S40)
5 = Stop lamp switch (S9/1)
6 = Starter lock-out/backup lamp switch
7 = CAN data bus signal from EA/CC/ISC, ABS/ASR, HFM-SFI or LH-SFI (right or Left) control module
9 = Left rear axle vihicle speed sensor from ABS/ASR control module or in W124 chassis Hall-effekt speed sensor.

I havenīt read the codes out before the error accured so I donīt know if some of them where old codes.
I didenīt had the chance to erease the codes before my mecanic just went changed the speed position sensor (more than 900$)
it got the mercedes number 000 540 1817

unfortunatly this didenīt solve anything
My car still has itīs ASR light on it is still not working togehter with the CC and im just over 900$ more broke.
BUT all the codes could be eraesed after this and has not come back ever sinse, but again i donīt know if it where old codes as i didenīt had the chance to erase them before the repair
I want to change the electric motor or what ever the linkage is attached to under the inlet manifold but it is realy not very easy to get there nor se anything from the top or bottom as the starter and a lot of other stuff is in the way.
This is clealy not the easy job as on the later M104 model 280/320 where it sits on top of the inlet manifold as a part of the throtle actuator.

Can anyone help out here to get to the bottom of this ASR and CC problem, please help, im dying to get it solved without ridiculess bills at a dealer shop as I already has been a victim for now 1 time.

Best regards to all of you.
BRABUS 3.6-24