Read this on a German m-forum, and just had to post it here.
Guy takes his M into the dealership for a hard to trace defect. The car stays with the dealer for a week, so they can run some tests. When he gets his car back it has 160 miles more on it (but with the exact same fuel level).
The fun part is that the mechanic didn't know he had a gps tripcomputer in his M. He studied the print out, and he saw that the car was taken to (most likely) the home address of the mechanic several times. He was not too upset as sometimes (with permission) that happens. When he studied the info more closely he saw that until 3 a.m. the car was parked outside a local disco
Guess the mechanic wanted to impress the ladies with his car
Since nothing happened to the car, he isn't sure he should report it to the dealership
I'd probably be looking for a gun
Frank.