My car has 4-wheel drive?
 Oh man.. I just did some research into the world of '4-matic'. And as all of you allready know and i just didn't had a clue of, it turns out to be a 4-wheel drive system.. -Which is not present on my MB.
My mistake originates in my firm belief in that '4-matic' was the name of the 4 gear auto tranny. Do i feel stupid or what.. -Though a little wiser now.[/edit]
I have only driven an old Opel Admiral and a new Dodge Ram with automatic before my own Benz. Both of them dropped rpm's to idle when you let off the throttle pedal. -No engine braking at all, unless you put the gear lever in 3'rd or 2'nd gear.