w140 OVP relay and rev counter q.

[cccscotland]

Hi all from a newbie to the MB world! Last week I bought a 1991 600 SEL which I love! What a fab car. A couple of minor (hopefully) problems though. Firstly from cold the ASR and ABS lights come on. Drive for 10-15 mins, switch off then on again and they go off and stay off. I've searched the forums, and it appears the first port of call is the OVP relay. I've had a good look for it, but can't find it. Where in the S600 would it be?

Also the rev counter doesn't work. Is this a common problem? What are the likely causes of this?
Many thanks in advance for any help!
cheers
Matt

 

[television]

Hi Matt, to start off your car does not have an OVP relay.

I think it will be necessary to do a few voltage checks, first making sure that you have 12v going to the ABS pump when the engine is running.

Malcolm

 

[eric242340]

This one is straight forward. change the front left wheel speed sensor. this sensor is for ABS/ASR. I take it your car is the 140 chassis?

 

[television]

The wheels sensors are the biggest or number one suspect,but to right itself after 15 mins is odd.
I think you will find the rev counter fault is in the instrument cluster,it is an individual component, the contacts to the PCB can require cleaning or tightning.


Malcolm

 

[cccscotland]

Cheers for this guys, I'll investigate and report back.
Many thanks
Matt