Quote Originally Posted by VehiGAZ View Post
I wouldn't mind a GPS-based tracking device in my 928 so I can see what the mechanics are doing with it on teh "test drives" they always seem to take.
I've got one of those Davis CarChips stuffed into the OBDII port on my Subaru. I originally got it to read the MIL codes, but it turns out to not be very good at that. Still, it records hours of speed information, and flags when I've been accelerating or stopping hard.

I left it installed when I lent my car to a friend, but I never read the results... I didn't want to know. Maybe it will help me out in a traffic ticket or an accident, some day. In the meantime, it stays out of the way and I just forget about it.

I can't honestly say I recommend the CarChip, but for the right paranoia, it might be perfect. Of course, your mechanic is probably the only other person who would find the chip immediately!