Unfortunately, my problem is not solved. I started the car today, no problem, and left it idle about 15 minutes. Then, just as I was getting ready to take it to the Mercedes dealer, the engine stalled out from idle. Now the colored lights on the mirror blink alternately when I turn on the ignition, and the car turns over but will not catch, same symptom as before.

Have tried two different keys and two different remotes, both with key lock/unlock and remote lock/unlock. Have tried resynch with battery negative terminal off/wait/reconnect. No luck.

I will let it sit for a while. Maybe I can get it started again and running long enough to get it to the dealer. Otherwise I will have to get it towed.