Hi! I have a quetion hopefully somebody knows the answer. My merc c180 kopmressor 2006 petrol manual was taken by my friend just to check what is the reading on kopmuter on my car to compare it to other car in his garage. My car had never an issue with anything all was 100%. My friend owns a garage , he rang us and asked as to take our car, as a nice person I did give it to him. Then he rang me few hours later said computer showed all perfect. Then he was gone, after 4 days he brouhgt my car back as he did give me his own car to drive these days i didnt say anything. Then we drove our car only one day for about 3 hours and then another 2 days for 20 min each day, so total was about lessthen 4 hours drive after we got it. Then car was parked near the house but when we wanted to start it it never did. My question is can he do something wrong by messing up with computer and do some error to my car computer thats why it didnt start? As when we took it to the nearest garage was told engine taiming chain jumped and broke all valves, that could happen after electronical ertor after our cars copmuter was messed with. As my car never had a problem before. Thank you!