THanks for your input. BTW I am in California and yes they do plug in the OBDII. After alot of searching one of the possibilities could be that the computer needs a firmware update. But the dealer has not offered that as a possibility and have been no help. It is in the shop now, I dropped it off when I picked up the e320 for the same thing, smog test obdII problems. This is getting really expensive, a '74 Lincoln Continental is starting to look pretty good right now - Exempt from smog req, simple and easy to repair, heavy so good in a crash, no computer junk to deal with.

__________________
1996 E320
2000 C230 Kompressor
1988 190e 2.3 - 225K miles, owned for 7 years. I cannot say enough good things about this car. Very well built, even at 225 it ran like new.