Thanks zip439 for your feedback!

we have disconnected the battery 10th of times since we got the remanufactured PCM in dicember last year, since the car at some point almost daily stop cranking.
I have checked for water both driver and passenger floor and it was dry. I have not checked the trunk, will do. The engine light is not on, my basic code reades says no errors.
The smog check is past due and my son plan to drive it for say 200 miles and hope to get the smog check done. I also hope that after say the 200 miles a code may come up and help figure.
My local authorized mercedes shop was asking $250 per hour to check the code and set them properly if necessary (caviat they said assuming our tool are compatible..), i have delayed it since
.1 trying to make sure nothing else obvious may be the cause
.2 if the battery has been disconnected some/all codes may have been resetted

Thanks
Salvo