Friend of mine has 1997 e230, when he starts the engine sometimes it wants to cut out, almost like its on two cyls then three then four, then its ok after that doesnt happen all the time, could be hot or cold no misfire at all when driving, problem only happens off the key, anybody had this?the first thing im going to look at is carbon build up on throttle body, then the usual ht leads and so on. ::