Diesel smell in cabin
Thread Starter
Newbie
Joined: May 2016
Posts: 3
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From: Coventry
cclass 220cdi
Diesel smell in cabin
I have a C class cdi 220 coupe and I'm getting diesel smell(unburnt) in the cabin. This happens only when the heating/air con is in use. There are no obvious signs of a diesel leak in the engine compartment. Has anyone experienced this problem and resolved it?
pmac
pmac
MBWorld Fanatic!
Joined: Jun 2006
Posts: 1,140
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From: Nova Scotia, Canada
2023 GLK250, 1987 560SL
You may have a leaking injector seal. Check that first - very common. With the engine running look under the hood to see if there is a jet of air coming from the cylinder head anywhere.
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
The other area to check are on the 2 sealing rings on the saddle fuel tank for the level sensors & pump. Under lower squab of rear seat under 2 cover plates. They sometimes leak!
Last edited by Glyn M Ruck; May 4, 2016 at 11:55 AM.
Senior Member
Joined: Jan 2011
Posts: 422
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From: McDade, Texas
W211 e320 CDI
My car has the tank sender sealing issue on hot days or very cold days if parked overnight with a very full tank. Up front I've had leaks at fuel/water contamination sensor and each fuel filter hose at different times, 176,000 miles and injectors seals are still dry on mine.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
My car has the tank sender sealing issue on hot days or very cold days if parked overnight with a very full tank. Up front I've had leaks at fuel/water contamination sensor and each fuel filter hose at different times, 176,000 miles and injectors seals are still dry on mine.
Thread Starter
Newbie
Joined: May 2016
Posts: 3
Likes: 0
From: Coventry
cclass 220cdi
Thanks to all who have replied to my question. I still haven't found the cause of the problem. The air temperature has gone up to 14 to 16c from 4 to 8c this week and there is now no smell in cabin when using air con so I will home in on the heater.
