Regarding the MB Manhattan, Inc. We'll it took 4 days to get my Trap Oxidizer replaced and the 210Kmi service done.
Other than that and the irritating reality of having to speak to a middle man (assistant service manager) who seemed somewhat disinterested, the experience was OK. It looks like the job was done correctly and report was understandable.
They allso ran a VMI (vehicle master index) which provided me with every time dealer work was performed on the car. Turned out to have been delivered at MB Manhattan originally.
The parts department was very helpful and my 10% MBCA membership works. They also seem to be able to get any part available over night in the worst case.