Guys Any help totally appreciated as I'm in a complete pickle! Few weeks ago my 2002 C Class W203 2.7 CDI avantgarde gearbox faield to engage. Engine ticked over fine but couldn't get the gearbox to engage whether manually or auto option. Took to local independent who had the box oil checked out for presence of coolant which came back negative. Opted to go for full gearbox and torque convertor replacement (recon with 12mth gtee) Took to S-Y motors in Birmingham Uk who fitted recon box but now they say there is an electrical problem with the ABS control unit/ECU. They sought help from Merc dealership who ran check and advised ABS/ECU was malfunctioning so they sent the ECU to ECU testing in Derby who advised there was actually no fault with the ECU. S-Y have now arranged for a specialist electrical engineer to help them diagnose and fix. I'm not exactly sure what the problem with the ABS/ECU is..S-Y haven't really explained that in detail. I think the ABS/ECU lights come on and in some way restrict the car speed but don't quote me on that. I'm worried that S-Y will try and claim the ECU/ABS problem was not of their making and was a problem prior to the refit - potentially even claim the ECU/ABS problem was the true cause of the transmission failure. Is this possible? Could an ECU/ABS problem be caused by transmission/gearbox failure? I'm obviously going to need to negotaite with S-Y at some point and don't want to get into discussions in complete ignorance of facts etc so any help would be appreciated.