Audi A6 C7 facelift 2.0 TFSI, 252 PS, 7-speed dual-clutch, all-wheel drive (2015–2018)

Research for this car

Generation guide Audi A6 C7 (2011-2018): known problems and buying guide
A roomy premium saloon with costly engine and gearbox risks, so check the 3.0 TDI camshafts, chains and gearbox history first.
Engine guide VW 2.0 TSI (EA888 gen 3 and 4) petrol: problems, costs and what to check
A strong engine with known weak spots, so check the water pump, turbo and oil leaks before you buy.

Issue	Affects	Typical km	Repair cost	Source
DL501 S tronic mechatronic and clutch faults	7-speed S tronic DL501	About 150,000 km	Several thousand GBP for a new unit (UK, year not stated)	Generation guide
Suspension wear and air suspension	All cars; air parts on cars with air suspension	80,000-160,000 km	No confirmed price	Generation guide
Water pump and thermostat housing leaks	Gen 3 and 3B; gen 4 with updated parts	15,000-50,000 miles (about 24,000-80,000 km)	750-1,250 GBP if not covered (UK, 2025)	Engine guide
Turbo and wastegate actuator failures	Gen 3, IS20 and IS38 turbos	Not stated	Not stated	Engine guide
Oil leaks at the cam area and rear seal	Gen 3	Not stated	Not stated	Engine guide
PCV and oil vapour tank faults	Gen 3; hard-driven and track cars	Not stated	Not stated	Engine guide
Carbon on the intake valves	Gen 3	Not stated	Not stated (about 1.5 extra hours of labour)	Engine guide

DL501 S tronic: test for jerks when pulling away and on downshifts. Ask for oil records (every 40,000-60,000 km). A scanner should show P189C or P17BF if the fault is stored.
Suspension: on a lift, check wheel bearings, bushes and dampers for play and leaks. On air suspension, check ride height; a scanner shows height sensor faults.

Coolant and water pump (scanner). Check the coolant level when cold. Look for a puddle under the front centre of the car. Read the stored faults for P00B7 (low coolant flow). Ask for an invoice showing the pump and housing were replaced as one assembly. Bad: low coolant, P00B7, or overheating. A missed leak can wreck the engine: 4,000-15,000 GBP for major damage (UK, 2025).
Turbo and wastegate (test drive, scanner). Check that boost builds smoothly with no hesitation and no warning light. Ask for turbo or actuator invoices. Bad: boost loss, a warning light, or a turbo replaced with no paperwork.
Oil in the intake (scanner). Ask whether the car was driven hard or on track. Check for a rough idle, a check-engine light, and oil in the intake. Bad: any of these, or a track history with no service record.
Oil leaks at the back of the engine (no scanner). Look under the engine and where it meets the gearbox. Bad: oil at the rear seal. The fix needs the gearbox separated from the engine, so the job is large.

Operational	€213
Workshop	€161
Fixed costs (tax, insurance)	€183
Total per month	€557
New-car depreciation (not included)	€99

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

Listings on mobile.de in this generation with this fuel, gearbox and power.

First registration	Listings	Median price	Median mileage
2018	27	€21,800	122,350 km
2017	19	€21,900	142,000 km
2016	13	€19,950	130,000 km
2015	11	€16,990	147,715 km

Medians only for years with at least 5 listings. Many cars are first registered after production ends, so years can run past the build years.

Month	Listings	Median price	Middle half	Median mileage
Nov 2026	70	€20,000	€17,490 – €22,990	131,500 km
Oct 2026	70	€20,000	€17,490 – €22,990	131,500 km

Median asking price at the last snapshot of each month.

All 2 ADAC versions

Version	Power	Body	Doors	Production years	Running cost per month
A6 2.0 TFSI quattro S tronic	252 PS	Saloon	4	2015–2018	€560
A6 Avant 2.0 TFSI quattro S tronic	252 PS	Estate	5	2015–2018	€554