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Hi everyone,
I purchased my first Mercedes this morning. I bought a 1999 E-Class 270 T CDI (I'm in Germany, not sure if they have the same sort of model elsewhere). The car has 200,000 km and seemed in good shape when I purchased it. I noticed on the way home, when driving on the autobahn, at 160km/h smoke started coming through the driver's side AC vent. At lower speeds this did not occur. I pulled off to the side of the road and had my friend run the car while I looked at the engine. There was a bit of smoke coming off the rear of the engine, it looked white or gray...just a tiny amount. Since that happened, there has been a persistent smell of burned rubber coming from the car.

I'm new to Mercedes and I don't know much about cars to begin with. I'll be taking it to the shop on Monday, but I'd like an idea of what is going on so I can brace my wallet. Anyone have any idea what it could be?
Cheers!
 

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1922 Ford T no OBD, no ECU, no SCN
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270cdi are loved in Europe, but they did not make it to America
Any smoke in engine compartment is subject to close inspection, but that smoke should not make it to the cabin.
Cabin takes fresh air from gutter under the windshield so bad hood gasket might be other issue.
 

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W212 350CDI -09 W219 320CDI -07 Ex:W220 320CDI -01 Ex:W210 270CDI -01 EX: W211 320CDI -04
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270 CDi is quite rare even here but does not differ so much from 220/320 CDIs about technology...

I would check injector seals (leak is heard by puffing sound when engine on run and seen as a black/moist stuff around injector), exhaust manifold gasket (any black around joint of manifold and block), EGR system leaks. Tough sound bit odd that smoke coming in cabin...
 
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