Hi I solved my trip computer problem, there was a wrong type coding plate in the trip computer (small circuit board attached to the trip computer PCB) It was for the K-Jetronic system and my car has a Motronic system...so no wonder it didn't work. Thanks to Mr. Haapala who send me the troubleshooting instructions (Finnish), I coldn't have found the problem without it. Sami Räsänen