Hmmmmm. New KEY? New SKREEM? Sounds to me like something didn't get programmed right when one of those was replaced. Also, I wonder about the antenna ring thingy around the ignition key. If that antenna can't couple to the chip in the key, it will turn over but won't start.

I wish I was closer, but I'm not. I like nothing more than a challenge!

If you are really at wit's end, try to find an independent Mercedes-experienced garage.



I wonder what Rudy would charge to fly down there and look at it?

 

Just speculating.. but doesn't the CPS tell the ECU when to fire on an ignition coil? What are the symptoms of a bad ECU.. never had to deal with one myself..

Replace the skreem module? Was getting two cranks and battery disconnect to do it all over again?

Homework assignment.. fully describe "intial" symptoms and step by step attempts at the repair.. Might help a lot on this..?

 

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---

 

I assume you mean there is 12V at each of the 6 coil packs ?
If so, then I hate to say it, but the PCM ( pricey module, and requires programming [ I think ] ) comes into play; see attached schematic.
( Try removing and re-seating all the plugs to the PCM - it is the MIDDLE module next to the K40 RCM )