I came across to a 140-S class WDB1400 inline 6 cylinder with ASD and ABS warning light on.

I ve diagnos it with the machine it - ABS i found the RPM sensor FR (front Right) malfunction and the Brake Light Switch came to display on the fault codes.

I was wondering what should i do with the ASD lights on.... i seems to have difficulty no faulty codes on ASD - Can anyone tell me what is ASD ?

I didnt know thas S class has this type of engine...140-s class until today

Rockerfella174
Brunei

 

ASD stanbs for automatic locking differential. it was the Benz first attempt at a traction control system. I would start by replacing the stop lamp switch. to test the wheels speed sensor, find the connector for it and the wheel housing. connect your volt meter to both pins and set the meter to AC voltage. then spin the wheel and watch the voltage increase with wheel speed.

 

Ive checked the ABS sensor or FR sensor was cut off.. so im goona replace it... brake light switch too i replace em.. but i havent start the car yet... as im still installing it.... i will later inform you the results

Thanks for the INFO MasterBenz TECH!!... Tq for youre help!!

Rockerfella174- Brunei

 

welcome