I think that Mercedes Ecu's are ****. I have read on different forums, of people having all sorts of problems. And I'm talk'en high end SL 55's and 600's. Here's what my gut instinct tells me. The reason why they have issues with indicator lights coming on and not knowing why. Why there are sensor malfunctions all the time, is because I think they'er under powered. Meaning the electrical is all screwy. I know for a fact they had a big recall on a lot of alternator's. Aparently they were under what they should have been puttiing out, snd eventually it shorted out the system. The reason why I know this, is because originally I wanted a white Crossfire. And the dealer I was at only had one, and it was in there shop getting a whole new deal put into it. He said if I wanted to wait for it, it would take two weeks, because they were getting the parts from Germany. I would have waited, but I needed a car, because I just sold my 02 Silverado like two days before. So I know there are some issues there. I notice the power dipping in and out at times.