Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
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The odometer operates off of the instrument clusters speed signal.This indicates the correct speed signal is being sent to the cluster to operate the odometer and the speedometer but since the speedometer is not operating as well as the other gauges and issues you see here this sounds like the common fault of the instrument cluster itself with it needing removed and replaced.
I have seen this fail before in the past needing replaced to correct this type of fault here.This will have to be done by either a dealer or authorized repair center for Mercedes as it will need setup and coded after it is installed using a dealers sds machine.
Unfortunately this can be a common fault and the instrument cluster is usually the cause in most all cases needing replaced.
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