The OM606 diesel used in the 96-99 MBs is 100% computer controlled. There is still a mechanical injection pump, but the fuel rack for that pump is controlled by an electronic actuator. There is no mechanical governor.

All of the OM60x diesels have idle speed regulation of some kind.

The 90-93 300D 2.5T has an electronically controlled wastegate (vacuum actuator, where the vacuum is electronically regulated).

There's more... but thats all I know off the top of my head.

__________________
John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k