Faulty gas gauge and tach

Question by JorgeC230K posted 4 months 2 weeks ago in 2001-2007 (W203)

I have a ‘02 C230K and I had water damage to my ECM and I sent it out to reprogram. When I reinstalled it the tach and gas gauge did not work at all. Can the dealer fix the issue with the MB Stars? I don’t want to be misled by them just so they can collect their diagnosis fee and tell me I need a new one.


Thank you.