clk320brah

I recently change my 2004 clk320 wheel bearings and after i drove my car i noticed 3 malfunctions abs-esp and bas i turned off my car and then when i drove it again it disappeared.
Like 8 days ago i got the same message again and it disappeared again.
Today i went to local shop to picked up my car (replace front lower upper arms and sway bar, right and left) and i have the malfunction again. Esp and bas see operators manual. And the yellow abs light on in my dash. What do you guys think it could be? Ive read alot of threads already but i cant find info for a clk w209. Thanks for your time

Yidney

Mess up a wheel sped sensor when you did the wheel bearings?

clk320brah

Thanks for replying.

I payed for it but took it to my local shop i have never been there before. I think they messed up something because since that day i got those malfuction. At thia point i dont know what to do, i already spent alot on it. Took the car for another ride and the malfunction changed and it says esp visit work shop and at the first disappear for like 5 seconds.

Yidney

OK, so you don't do your own work. If that the case, your only option is to go back the same shop, or a different shop. I'd go back to the same shop if the fault really started the same day you got your car back from the wheel bearing repair. I think they messed up a speed sensor at that wheel. It's not an expensive part. It's basically a like a magnet with a wire connected to it that reads the gaps in the teeth of a "gear". They may have forgotten to remove it and tore the wire, or forgot to put it back and it's just hanging there, or they got a blob of grease on the gear teeth and its not reading right. If you can at least jack up that wheel and remove it, you can look behind the brake rotor and see if there is anything obvious. There's only that one electrical wire to your wheel.

clk320brah

Thanks again yidney for your time, i really appreciate it, now i feel better. Thought it was going be something more expensive.

Well sometimes i do some work but just the basic you know replacing rotors and pads, oil change etc.
I dont think i still have warranty since it was like 2 months ago. I have 3 more question.

Do i have to remove my wheel bearing again to check it/fix the problem?
Does every wheel has a sensor?
When i replace the speed sensor do i have to reset it ? If yes, how?

Hope its not too many questions.
Thanks in advance in.

Yidney

No need to remove wheel bearing. Just go remove a front wheel and follow the wire.

clk320brah

Ok thank you sir, i will do it later today and report back

clk320brah

Removed the wheel today and everything looks right. I dont have a tester so i coundnt do that much. Tomorrow i will test the baterry , probably i will end up taking the car to the dealer on monday. I dont know what else to do at this point. Some time light desappear for few seconds but my breaks get alot worse when it happens.

mis3

I had similar experience when I went to an indie to change the wheel bearings 2 years ago.

Somehow they installed the one of the seals incorrectly. This seal is a ring which is magnetic only on one side. Putting it in on the wrong side would trigger ABS, ESP and BAS. Also, cruise control would not work as well.

Also, a defective speed sensor would trigger the same alerts as well.

clk320brah

I decided to order the speed sensor, i will replace it and see if the light disappear. If not probably it would be the seal you are talking about. And im pretty sure the error is in my right wheel since i had a problem breaking to my left side. Thanks for replying. I will update this thread once i find out whats going on.

clk320brah

Put the new speed sensor (right side) today and abs light disappeared, everything is working perfect now, the old sensor looks ok but probably had some damage inside. thanks to everybody who replied.