97 e320 in limp home mode

[tex]

This morning, my wife's e320 lost normal power and the
check engine light came on exiting the freeway after a
15 minute commute. She does not know if the ASR light
came on. I do not think it is related, but last week
the CD player went on the blink.

My local dealer lost the Mercedes franchise so my
only option is a tow from Reno to Sacramento for
warranty service.

Finally, my question: What are the most likely
items I can check on a shade tree basis?

Darrell in Pompeii in the Sierras