I got a mercedes benz c180 kompressor 2002, few times while am driving the car slows down with my foot on the gas pedal. Then it will slowly speed back up again (it is worse in gear 1,2 and 3 where it goes to kick mode). Took it to the garage for them to check spark plugs but all ok. Did anyone...
As some of you know i bought a A class merc 170cdi for girlfriend,was fine until today farthers day, if i go on the motorway and take it pass 70mph the car slows down and wont go pass 2,500 revs, any thoughts, theres no smoke at any speed so not the turbo, if you drive it at 70 mph perfect soon...