Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
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Code U0155 usually indicates a loss of communication fault with the instrument cluster itself.With what is occuring here and this code being set this sounds like the instrument cluster itself is at fault here needing replaced to correct this issue.I have seen the cluster fail in the past before requiring replacement causing this issue here.
When it is replaced it will need to be set up and programmed by a dealer with their SDS machine unfortunately in order to work and has to be replaced with a new one.
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