Hi there, I hope someone can point me in the right direction.....

Just got my hands on a lovely silver E320 and am enjoying every minute. Two things bugging me though:

1 - I don't think the traction control (that's the ETS, right? so many safety systems!!) is working. When I put my foot down hard I get significant wheelspin, the warning light on the dash illuminates but I don't think it's reigning the engine in the way it should. How can I test this, and can anyone suggest some steps to diagnose where the problem lies?

2 - Electric sunroof is dead. It's not the fuse, what should I check next? Is there a control module somewhere that might be dead?

Thanks! Very pleased to be on the road in my first Merc . Think it's going to be the first of many.....

George

 

normal.

 

Fair comment, but my brother drives the exact same model and year, and his doesn't slip around nearly as much.

We've compared the two and the traction control in mine definitely seems not to be working.....

 

...but you will get the ETS malfunction indicator lamp all the time whenever it is faulty.

different tires perhaps?

 

No don't think it's the tires. We've tried it with two different sets of wheels with the same results.

I think this is going to require some further investigation. Not sure quite what to try though. I suppose getting the car with one wheel on slippery terrain (smooth grass for example) and one on tarmac and then a bit of heavy acceleration might give me definite proof that the ETS isn't functioning. Beyond that I'm not sure what to look at. Are there workshop manuals available from any source?

 

Further info: whenever there is a loss of traction, whena I stop the car, I receive the message: ETS EL. TRACTION SUPPORT on the display. I think this surely indicates an ETS fault?

 

best way is to read the fault code.

maybe the speed sensor signal is implausible.

 

Sounds like a good idea. How do I read the fault code? Should it be displayed in the car? I only received the error I posted before: "ETS EL TRACTION SUPPORT". Doesn't mean much to me, other than there's obviously a problem with the traction control.....

 

you need find a workshop who got scanner.

if the ETS lamp is lit all the time after braking, you got problem.