You have to switch off and restart before it can move well again
engine slows down at traffic light and moves only slowly except restarted on 2002 Mercedes-Benz ML320
GO SEE A GOOD MBZ TECH AND SCAN FOR CODES AND GET DIAG
eventually yes I have to conduct a diagnostic test on it
3 more answers , 2 more comments
have european car specialist look at your car.
eventually yes I have to conduct a diagnostic test on the car
any check engine light on?
Yes check engine light is on
Injectors may be dirty. Try a bottle of "Chevron Techron" Injector cleaner. It works wonders. Having codes reset after is not a bad idea either.