>> I would not call the IFI pump on the 606 "fully electronic."

Point taken, but;

a) in comparison with most of the W123s which people are used to, the pump on a W210 OM606 is light years ahead,

b) for an inline pump, I think it's about as electronic as you'll find on an MB car,

c) I meant, and should have made clear, that the injector pump on a W210 is controlled by the driver in a solely electronic way - there isn't even a mechanical accelerator linkage, whereas the W124 OM606 does have electronic idle speed control, but does have a mechanical accelerator linkage.

Despite the pedantry, [which is admirable - I salute you sir!], , my advice still stands, check the TPS via live data.