Hi Mike,
I've not had those codes pop up on either of our E300's - will check the manual to see if I can find any more information on either. In any case, it's entirely possible that one of the codes is causing the car to go to limp mode. If you take it out and floor it and it won't run up close to redline and/or holds at about 3500-4,000 rpm but doesn't want to shift up to the next gear that's probably what's happening. Not much help, I know. Will advise if I find anything that can help.

fred