car don't start until engine warms up

Asked by Jan 30, 2017 at 05:14 PM about the 2011 Mercedes-Benz C-Class

Question type: Maintenance & Repair

I have a c220d 2011 automatic
in the mornings it doesn't start, straight  away.
Basically I have to rev the gas pedal until the temp
get over 50/60 it takes about 10 mins. but then
runs fine. Iv noticed every time the engine is cold it
won't start straight away. Iv been using the car for
a month like this and thought it might get better
when the weather gets hotter. But it's doing the
same thing never morning any ideas what it could

1 Answer


I'm not a Mercedes mechanic so take this for what it's worth - check the EGR valve, should be closed with cold engine/at startup. If it sticks open, can cause hard starts and rough idle.

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