Mobile Service arrived on time and set right to work. As they weren't certain which molding (rev 1 or rev 2) would be right for my M3, they brought a package of both. And neither fit - turns out that the packages had M3 part code numbers but the parts were actually for MY. The Tech contacted Tesla Service Centers in the two adjoining states that have Service Centers and asked them to check their inventory: Both had parts in stock and both had the same issue - MY parts in M3 packages. So the problem had to be reported to Fremont and new parts had to be ordered - and Mobile Service hopes to return to complete the repair in five weeks...