Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
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3 of the 4 fault codes point to the sensor that you just replaced. Is your ABS sensor paired with a reluctor ring or magnetic wheel bearing? The codes refer to implausible signal so, the signal from the sensor is incorrect. Also, is the sensor from MB or is it an OEM replacement?
Sometimes the ABS sensors from these OEM companies can be bad.
You should be able to tell from the position of the ABS sensor, if it is facing down on the driveshaft, you will have a reluctor ring on the driveshaft. If the sensor is pointing outwards, towards the brake disc, it will be reading the magnetic wheel bearing.
Was there any damage to the sensing surface of the old ABS sensor?
You need to inspect the wheel bearing, the inner part of the bearing will be magnetic, which is what the ABS sensor is paired with. Do you have any play in the road wheel? (you will have to lift the wheel off the ground to check for play).
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