poor starting c200 sport auto

[fisky]

untill recently it started without use of accelerator it now takes two attempts for a rather lumpy start. any ideas.

 

[tamrsoft]

I had a similar problem on my C200 Sport, it wouldn't start with the foot of the throttle. I found a carbon build up in the throttle body around the area of the butterfly valve, I removed the throttle body to clean it out although I believe other people have used carb cleaner to do the same thing. After this it started perfectly from both cold and hot.

 

[Rumble]

yep same problem on my w202, build up on the throttle body was the cause, thorough clean out with carb cleaner did the trick for me. Took it to a merc specialist first who hooked it up to the machine and read the fault as the throttle body, they quoted £300 for a new one. Try the carb cleaner first not much money or effort for it really.

 

[fisky]

thanks i'll give it a try