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he second generation Audi A6 was introduced by the German manufacturer in 1997. The first novelty about this model was the all-new Volkswagen Group C5 platform, featuring a completely revised design and newly-developed suspension. Then there was the new optional 5-speed tiptronic automatic transmission.

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Dark smoke while accelerating

Audi a6 allroad 2,5 tdi. Feels like it losts power too in torque.

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I assume it's a black smoke, but to be sure can tell me the color of the smoke it's either black or blue.

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It is either burning oil or burning too much gas. Black smoke it too much gas - or diesel.

Could be bad piston rings or valve seals for the oil, or bad injectors or sensors for the gas.

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