2009 c63, 132.000km, about 80.000 miles, when car stays in traffic (gets a little hotter) all the lights show up in the instrument panel, no ABS, No power steering, speedo doesn't show speed, auto door lock doesn't work.
If cars stays off for about an hour, everything goes back to normal.

If I drive on a highway (well ventilated area) no issues happen, if it stays in traffic for a long period issue occurs.

Could this be battery? Alternator ?

The only other issue is a hard start in the morning

 

What does your battery drop to when you go to start the beast? Also can you hear the E fan running? "when its hot in traffic"

I went through something similar and the battery was cooked dropping to 8V during the start cycle but sitting 12.5V before the cycle was initiated. I had ESC error/ ABS issues and other ones but to me this sounds like power-related issues. I had similar issues with a GLK250 Diesel as well. From my experience, Mercedes does strange things when the voltage isn't high enough.

 

Tomorrow I'll test and video the voltage drop.

Get back to you ASAP

 

The errors logged on the ECU

 

I would read this thread: https://mbworld.org/forums/c63-amg-w...-steering.html

Seems to align with all your symptoms 2 different scenarios but my guess is wheel speed sensor and a weaker battery is making it show up.

So might be worthwhile to get a new battery while your at it.

 

Will tranalate and send to my mechanic!

 

Sounds good let us know always great to have confirmation of what turns out to be the problem.

 

He'll be able to check car tomorrow!

I'll keep you guys posted

 

Looking forward to hearing hope its simple.

 

how hard is it to replace the wheel speed sensor?

my mechanic is fully booked, I’m thinking about doing myself.

 

I don't think it's that hard, and I think, (just guessing) it's the same sensor used for the ABS. Others here will know better. GL

 

Hi all, I was unable to take it to the mechanic yet, but today after driving 1 hour or so, same issue appeared, one thing caught my attention, the brake lights stays on when driving, so I'm thinking the ABS central might be needing repair.

Any thoughs?

 

Quick update, rode the car with ESP off, no issues for the last 5 days.

most likely it is the wheel speed sensor

 

After testing every single sensor in the car, replaced the battery, issue is gone now!

Always check your battery first guys,replace for a new one, quality brand and @ the correct amp (95A)

2 shops tried to scam me trying to charge a lot to fix the ABS CENTRAL.

Thanks for the replies!

 

Hope you solved the problem. Yeah, the battery does have an important role on the overall "sanity" of the vehicle