I thought I had seen it all from this board on the M5 but I quess not. I had my car in for inspection II this last week as well as a little dent removal. When I read the paperwork concerning the check engine light that was on I was quite surprised as to the reason - seat motor fault! That's right, the seat motor caused the check engine light. It was a momentary fault and on the good side, it has nothing at all to do with the engine. What's next an under waxed condition on the paint causing a engine fault? :confused3
The inspection II turned up no issues and it was quite reasonable in cost compared to others I have seen here, $568. This included the oil change at $4.60 per quart for 5W 30 which is less expensive than me buying it and changing it! The car has 47,075 miles showing and I could not be happier at this point.
I guess observing the proper break-in procedures is paying off in the long run. This would certainly be a caution to those of you looking to purchase a used M5. I realise it is next to impossible to tell how the car was broken in, but it will make a difference over time.