An Update on this cruise control unit. I've got about 200 miles on the cruise control unit.

It does operate a bit differently than the stock unit. The way its wired into the stock (Mercedes) switch. Up and Down are still the positions to set the speed and Resume is Up or Down with the stalk, but when you pull the control arm towards you it's like tapping the brake, it disengages the cruise control unit (that's the biggest change). Off is still in the same position.

Acceleration is a bit slower using this cruise control unit, but you can step on the go pedal and reset the control unit. It does hold the speed well. I had surging on declines that is why I replaced my unit. Tried adjusting control arm length. Replacement amp ($150 or control motor ($250) were more expensive. It holds speed well on hills (the few and not very steep ones we have in Central Florida).

Overall I'm happy with this unit. The whole unit was cheaper then fixing the amp or control motor.

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92 300D 2.5L OM602 OBK #59