Had one for my 300E some years back, and it paid for itself in one repair (lost the A/C evaporator back then). There were other non-related repairs that were necessary then, and the total bill came to $2800. I was only out the $250 deductible, far less than the hit I would have taken otherwise...
The dealer here charges $100/hr for labor, and with most newer MBs, there are ancillary processes necessary to get to the offending part, including diagnosis. So a $300 part can take nearly a full work day to troubleshoot and install, and you can wind up with a bill of $1000+!
So the warranty can easily pay for itself with just a couple of repairs. Cheap insurance, I think.
