1st ------died while driving ----came to forum-----saw no start problems replaced cps-----fixed --ran for a week --------died again----bought another sensor still no start ---cranks but no spark - ---relay control repaired still no start-------cam sensor still no start-----took to a shop--scanned no codes -----saw on mb forum could be key and or key fob may be locked in anti thieft mode ------bought new key still no start-----saw also skreem module could be bad replaced that-- still no start---gets fire as far as coils-from coils out nada --has injector pulse all other items works ie: Radio ,,dash lights ---headlamps - signals light door lock and unlock--this weekend found new battery is dead as a door nail--something draining it , my alarm horn does not sound when alarm is set-------i am taking outa that shop been takin up his bay for a while--they are being very cool about it --said let them know what ends up being problem---------i ahve seen on here several years back someone has exact same issue --but never posted back what fixed ----- thx agian to all and have a great week---