Hi im new to owning a Mercedes but I managed to get a 2004 c220 cdi for almost nothing as it has a problem some where... My issue is it runs but won't rev beyond 3000 I have connected a laptop to try and see why the engine light is on and it just says its not connected and ive tried two different software packages one is toad.... Unfortunately the car has no mot as its been stood for 18 months.... Im thinking the ecu might be faulty but not sure anyone else had these issues? Thanks in advance..