Audi A6 C6 2.0 TDI, 140 PS, 6-speed manual (2004–2008)

Research for this car

• Generation guide Audi A6 C6 (2004-2011): known problems and buying guide

  Buy with a service record. Check gearbox smoothness, the 3.0 TDI chain noise and oil use before paying.

• Engine guide VW pump-injector TDI (1.4, 1.9, 2.0 PD and 2.5 R5): problems, costs and what to check

  Oil pump drive, rod bearing, head crack and cam faults are reported. Buy only with oil records and proof of the pump and head work.

Known issues for this car

Before you buy this car

From the generation guide

1. On a 2.0 TDI pump-injector, check for an oil pressure warning. Ask whether the oil pump drive was checked or replaced.
2. On a diesel, ask whether the particulate filter was cleaned or replaced. Diesel smell in the oil is a bad sign.

From the engine guide

1. Oil pump drive (no scanner). Ask for proof that the oil pump drive or the balance-shaft module was replaced or checked. Bad: no record on a 2005 to 2009 car.

Running costs

ADAC figures for 15,000 km a year over 60 months

ADAC versions