Carsieve Audi A6 C8 S6 TDI, 344 PS, 8-speed automatic, all-wheel drive (2020–2023)
- Power
- 344 PS (253 kW)
- Engine codes
- DMK
- Gearbox
- 8-speed automatic
- Production years
- 2020–2023
- Running cost per month
- €758
- Fuel
- Diesel
- Median price
- €42,980
- Reliability
- 3/5
- DIY
- 1/5
Research for this car
- Generation guide Audi A6 C8 (2018-2025): known problems and buying guide
A quiet, roomy executive car with a costly 48 V generator risk on early cars, so check the generator and software history first.
Known issues for this car
| Issue | Affects | Typical km | Repair cost | Source |
|---|---|---|---|---|
| 48 V belt starter-generator failure | Cars built 2018-2020, several engines | Not stated | 1,190-2,300 EUR (ADAC, Germany, year not stated) | Generation guide |
| MMI and infotainment faults | Early cars, about 2018-2020 | Not stated | No confirmed price | Generation guide |
| Sluggish pull-away on the 3.0 TDI V6 | 3.0 TDI V6 (DDV, DMG) and S6 (DEW, DMK) | Not stated | No confirmed price | Generation guide |
Before you buy this car
From the generation guide
- 48 V belt starter-generator: on a 2018-2020 car, start it from cold and look for a network warning. This check needs a scanner; a dealer with ODIS should read the generator and 48 V battery faults. Bad: a yellow or red network message, a warm idle stuck near 1,000 rpm, or start-stop switched off.
- MMI and screens: test both screens, sat nav, radio, climate and driver-assist systems together. Ask for the software version and the date of the last update. Bad: a screen that freezes, lost favourites, or a warning that cruise control is not available.
- 3.0 TDI pull-away: drive a 50 TDI or S6 from a stop and at low speed. Bad: a long hesitation before the car moves. Ask whether the engine and gearbox software updates were done.
- Recalls: ask an Audi dealer to check open campaigns by VIN, especially the panoramic roof, passenger airbag and rear axle campaigns.
Running costs
| Operational | €231 |
|---|---|
| Workshop | €270 |
| Fixed costs (tax, insurance) | €257 |
| Total per month | €758 |
| New-car depreciation (not included) | €165 |
ADAC figures for 15,000 km a year over 60 months
Market
Listings on mobile.de in this generation with this fuel, gearbox and power.
- Listings
- 404
- 25th percentile
- €38,980
- Median price
- €42,980
- 75th percentile
- €46,490
- Median mileage
- 85,892 km
- Median first registration
- 2023
- Dealer share
- 99.8%
Check a listing
Prices by first registration
| First registration | Listings | Median price | Median mileage |
|---|---|---|---|
| 2023 | 248 | €44,450 | 78,633 km |
| 2022 | 91 | €41,690 | 85,000 km |
| 2021 | 63 | €37,990 | 105,840 km |
| 2020 | 2 | – | – |
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.
Price history
| Month | Listings | Median price | Middle half | Median mileage |
|---|---|---|---|---|
| Nov 2026 | 404 | €42,980 | €38,980 – €46,490 | 85,892 km |
| Oct 2026 | 404 | €42,980 | €38,980 – €46,490 | 85,892 km |
Median asking price at the last snapshot of each month.
ADAC versions
All 3 ADAC versions
| Version | Power | Body | Doors | Production years | Running cost per month |
|---|---|---|---|---|---|
| A6 allroad 55 TDI quattro tiptronic | 344 PS | Estate | 5 | 2020–2023 | €705 |
| S6 Avant TDI tiptronic | 344 PS | Estate | 5 | 2020–2023 | €765 |
| S6 TDI tiptronic | 344 PS | Saloon | 4 | 2020–2023 | €758 |