The service manager called me on Saturday afternoon and left a message that the car is done. he said I was right about the carbon build up but they didn't use walnut shells to clean the valves out. He said they used another BMW authorized method? I'll find out when I get it. I need to drive an hour and a half out to the dealership to get it. Hopefully the weather will cooperate at 7am so I can head out there right after work before this "ice storm" hits us. I'll definitely keep everyone posted.
2006 BMW 330xi Manual
1984 Mercedes 300TD-T
1999 Mercedes E300 (run on WVO)
1998 Ford F150
and 48 cars that I've owned and sold over the years
I go through cars like baby's go through diapers!