Ok after $620 bucks, It was the computer. ECU. I got one from a local junk yard and changed the OVP. By the way the two fuse relay DOES NOT WORK on the 300's with a single fuse. They fit but they make the car behave crazy.... lights flashing when starting...exc... I had to pay Mercedes to do all the work for the reason of not being able to dign. the problem myself. I did change the cold start valve, and all the lines to the idle contol valve that had got hard and allowed air, or I thought to go in to the system. I checked all the vaccuum lines, that are all fine. They spent a few hours checking sensors and stuff and came up with the ECU being the problem. When changed, the car starts great. At all temps. Thanks for all the info and the help. Just know that the http://www.peachparts.com/shopforum/showpost.php?p=1029163&postcount=2 is not the answer to all the not starting problems. I know that it mentions the ECU but that being a problem is not stated. Later,
Rob