hi all, im new on this forum, i have a '98 c280 sport bva with many options (i ll make a presentation topic soon)
but i have a big problem, yesterday i tried to change my spark plugs but when i try to unscrew them, they turn on it same without coming out cylinder bloc :/. and if i unscrew 3 turns for ex and i screw 3 turn in other sens, spark plug screw up themselves and block themselves normally
do i need special mercedes key?
thanks in advance

 

they should just screw out.

 

hum ok i will try again this afternoon :/