I posted this on the other thread, but here it is again. I suggest anyone having problems go to the Mercedes Benz SLK 320 forum, and join. Identify yourself as a Xfire owner. They were extremely helpful when I asked questions, and I found many of our problems were also their problems, but already solved because of the age of their cars compared to the XFire.

Sorry, I do have the link available for that forum.

It really does sound like a ground/battery problem or a problem with the anti-theft system.

I am editing this to reflect two MB forums. You might use the search feature to see if the problem is listed:

1. http://mbworld.org/forums/Index.php

2. http://www.benzforum.com/forum/