Audi A6 vs Mercedes-Benz C-Class
Audi A6
Audi’s executive saloon.
Mercedes-Benz C-Class
Mercedes’ compact executive saloon.
Audi A6
Pick the A6 if you want a roomy, quiet, tech-forward executive saloon — a more comfort-focused alternative to the BMW 5 Series.
Mercedes-Benz C-Class
Pick the C-Class for an S-Class-inspired interior, a hushed ride and efficient engines in a premium compact executive sedan.
Performance
EA888 45 TFSI · Petrol vs M254 C 200 · Petrol
| Audi A6 | Mercedes-Benz C-Class | |
|---|---|---|
| Power |
245 hp
Winner
|
204 hp
|
| Torque |
370 Nm
Winner
|
300 Nm
|
| 0–100 km/h |
6,0 s
Winner
|
7,3 s
|
| Top speed |
250 km/h
Winner
|
246 km/h
|
| Power-to-weight |
148,5 hp/t
Winner
|
129,5 hp/t
|
| CO₂ emissions (WLTP) |
160 g/km
|
140 g/km
Winner
|
| Consumption (WLTP) |
7,1 L/100km
|
6,2 L/100km
Winner
|
Dimensions & space
| Audi A6 | Mercedes-Benz C-Class | |
|---|---|---|
| Boot |
530 L
Winner
|
480 L
|
| Boot (seats folded) |
—
|
—
|
| Wheelbase |
2,92 m
Winner
|
2,84 m
|
| Length |
4,94 m
|
4,69 m
|
| Width |
1,89 m
|
1,81 m
|
| Height |
1,46 m
|
1,44 m
|
| Seats |
5
|
5
|
Powertrain & tech
| Audi A6 | Mercedes-Benz C-Class | |
|---|---|---|
| Platform | MLB Evo (longitudinal) | MRA (rear-wheel-drive base) |
| Drive | Front-wheel drive · All-wheel drive | Rear-wheel drive · All-wheel drive |
| Engine family | EA888 petrol · EA288 diesel · plug-in hybrid | M274/M264 petrol · OM651/OM654 diesel · plug-in hybrid |
| Fuel | Petrol · Diesel · Plug-in hybrid | Petrol · Diesel · Plug-in hybrid |
| Transmission | 7-speed S tronic (DSG) | 9G-Tronic (9-speed automatic) |
| Euro standard | Euro 6d-TEMP (early) · Euro 6d (later) | Euro 6 (early) · Euro 6d-TEMP (later) |
| LEZ access | Euro 6 diesel allowed in the LEZ (Brussels/Antwerp/Ghent) | Euro 6 diesel allowed in the LEZ (Brussels/Antwerp/Ghent) |
Reliability & watch-outs
Known issues
- S tronic (DSG) mechatronics are the best-known weak point, especially on diesels
- EA288 diesels: AdBlue/SCR needs attention with mainly short trips
- Direct-injection TFSI petrols: carbon buildup with lots of short trips
- OM651 diesel: stretched timing chain on early cars
- 9G-Tronic can shift jerkily (early software)
- COMAND (NTG5) infotainment can freeze
Pros
- Premium interior quality and finish
- Hushed, comfortable motorway cruising
- Wide engine range (petrol, diesel, plug-in hybrid)
- S-Class-inspired interior with high-grade materials
- Quiet, refined ride (optional Airmatic air suspension)
- Efficient OM654 diesel (post-facelift)
Cons
- Firm ride on sport (S line) trims with larger wheels
- Steering less engaging than a BMW 5 Series
- Firm ride on AMG Line + big wheels
- Limited rear headroom (sloping roofline)
Driving experience
Audi A6
As a model line, the A6 is a quiet, refined executive saloon built to cover long distances effortlessly. The steering is light and accurate, the ride is composed, and the cabin stays hushed at speed. Front-drive versions are easy and economical, while quattro adds secure, reassuring traction. The 2.0 TDI is strong and frugal, the 2.0 TFSI smooth, and the 3.0 TFSI brings effortless pace. It is tuned for comfort and stability rather than sharp handling, so it feels calm, planted and effortless on long journeys.
Mercedes-Benz C-Class
—
Compare specific generations
Belgian taxes & LEZ
For sale at dealers
Audi A6
30 for sale · from € 7.990
Audi A6 35 TDI · Business Edition · CarPlay · Navigation · LED
Garage Carrera Cars
Audi A6 30 TDI · plug-in hybrid · Camera · CarPlay · LED
GDCauto
Audi A6 35 TDI · CarPlay · LED · Leather
click2move by Declerc
Audi A6 35 TDI · Camera · CarPlay · Navigation
click2move by Declerc
Mercedes-Benz C-Class
0 for saleNo listings at the moment
