Guys, serious...

Any Mercedes with K-Jetronic after, I think, MJ 82, has an automatic fuel shutoff when the engine is coasting.

When you have more than 1500 rpm (guess why there is a sensor, it is not because of the cruise control) and lift of the foot of the trottle a vaccum engaged device shuts of the fuel supply to the injection nozzles.

Concerning the automatic transmission: Newer cars with databus between gearbox and engine control in fact reduces power output by shuting of the fuel supply during shifting of he tranny to avoid harsh shifting.

Kind regards
Eberhard
(who sometimes wonders, why some people have the convidence to give answers when in fact they have no clue what they are talking about)