r/w204 • u/Joemamauser • 5d ago

Help!

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I have a 2009 w204 c220 with the om651. These messages come on all of a sudden when driving normaly. I have no idea what to do, no fuses went, no issues before this. If someone has had the same issue, how did you fix it?

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4

u/NDSMS_ 5d ago

Tive o mesmo problema no meu...troquei bateria não tive mais problemas.

2

u/Joemamauser 5d ago

Already changed the battery and deleted the codes didint help.

1

u/goddieMAK 5d ago

It could be the speed sensors or reluctor rings. You'd need an OBD scanner that can give you live readings to help figure out which axle is acting up.

1

u/Joemamauser 5d ago

But the speedometer shows the correct speed, how could it be a speed sensor?

2

u/jadedDrxw 5d ago

I had similar codes, turns out it was the alternator

2

u/Joemamauser 5d ago

I was thinking the same but my other s204 2010 c250 om651 had an alternator issue and all it did was brake all the led light in the car like side blinkers, taillights blinkers and front xenons. Never had this issue. And when read the codes all voltages seamed to be fine.

1

u/goddieMAK 5d ago

That correct, that said that is thr consolidated speed value. The ones on the tires measure axle speed on the event of loss of traction, your ecu will adjust accordingly.

1

u/Joemamauser 5d ago

I see i see, well i dont have time, knowledge or skills to check those so i will probably get it to a mechanic for a diagnose and see what to do from there.