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Audi A6 Avant vs Mercedes C Class Wagon - Differences and prices compared

Compare performance (367 HP vs 680 HP), boot space and price (49700 £ vs 42400 £ ) at a glance. Find out which car is the better choice for you – Audi A6 Avant or Mercedes C Class Wagon?

Audi A6 Avant

Mercedes C Class Wagon

Here’s where it gets real: The technical differences in detail

A6 Avant

Costs and Efficiency:

Price and efficiency are often the first things buyers look at. Here it becomes clear which model has the long-term edge – whether at the pump, the plug, or in purchase price.

Mercedes C Class Wagon has a to a small extent advantage in terms of price – it starts at 42400 £ , while the Audi A6 Avant costs 49700 £ . That’s a price difference of around 7272 £.

Fuel consumption also shows a difference: Mercedes C Class Wagon manages with 0.40 L and is therefore decisively more efficient than the Audi A6 Avant with 2.30 L. The difference is about 1.90 L per 100 km.

As for electric range, the Mercedes C Class Wagon performs slight better – achieving up to 112 km, about 11 km more than the Audi A6 Avant.

C Class Wagon

Engine and Performance:

Power, torque and acceleration are the classic benchmarks for car enthusiasts – and here, some clear differences start to show.

When it comes to engine power, the Mercedes C Class Wagon has a convincingly edge – offering 680 HP compared to 367 HP. That’s roughly 313 HP more horsepower.

In acceleration from 0 to 100 km/h, the Mercedes C Class Wagon is evident quicker – completing the sprint in 3.40 s, while the Audi A6 Avant takes 4.70 s. That’s about 1.30 s faster.

In terms of top speed, the Mercedes C Class Wagon performs a bit better – reaching 280 km/h, while the Audi A6 Avant tops out at 250 km/h. The difference is around 30 km/h.

There’s also a difference in torque: Mercedes C Class Wagon pulls clearly stronger with 1020 Nm compared to 550 Nm. That’s about 470 Nm difference.

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A6 Avant

Space and Everyday Use:

Whether family car or daily driver – which one offers more room, flexibility and comfort?

Both vehicles offer seating for 5 people.

In curb weight, Mercedes C Class Wagon is barely noticeable lighter – 1755 kg compared to 1865 kg. The difference is around 110 kg.

In terms of boot space, the Audi A6 Avant offers slight more room – 503 L compared to 490 L. That’s a difference of about 13 L.

In maximum load capacity, the Audi A6 Avant performs hardly perceptible better – up to 1534 L, which is about 24 L more than the Mercedes C Class Wagon.

When it comes to payload, Audi A6 Avant barely noticeable takes the win – 570 kg compared to 565 kg. That’s a difference of about 5 kg.

Who wins the race in the data check?

The Mercedes C Class Wagon sits well ahead of its rival in the objective data comparison.
This result only shows which model scores more points on paper – not which of the two cars feels right for you.

Audi A6 Avant
Mercedes C Class Wagon

Costs and Consumption
View detailed analysis

Engine and Performance
View detailed analysis

Dimensions and Body
View detailed analysis
from about £42,400
C Class Wagon

Mercedes C Class Wagon

  • Engine Type : Petrol MHEV, Plugin Hybrid, Diesel MHEV
  • Transmission : Automatic
  • Drive Type : Rear-Wheel Drive, All-Wheel Drive
  • Power HP : 186 - 680 HP
  • Consumption L/100km : 0.4 - 9 L
  • Electric Range : 11 - 112 km
details

Audi A6 Avant

The Audi A6 Avant wraps executive poise and usable practicality into an impeccably finished estate that makes everyday driving feel noticeably more grown-up. It serves up a calm, composed ride and clever packaging for buyers who want space and refinement without ostentation — the sensible choice that still manages to impress.

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Mercedes C Class Wagon

The Mercedes C-Class wagon dresses Mercedes refinement in a sensible, practical package, marrying a sleek estate silhouette with a plush, high-quality cabin that feels more premium than its badge implies. It quietly soaks up motorway miles and cartloads of family kit with composed handling and effortless comfort — a clever alternative to an SUV for buyers who still like to steer.

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Reviews Audi A6 Avant

Reviews Mercedes C Class Wagon

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Costs and Consumption
Price
49700 - 70200 £
Price
42400 - 115300 £
Consumption L/100km
2.3 - 7.5 L
Consumption L/100km
0.4 - 9 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
94 - 101 km
Electric Range
11 - 112 km
Battery Capacity
-
Battery Capacity
19.50 kWh
co2
53 - 170 g/km
co2
11 - 206 g/km
Fuel tank capacity
56 - 60 L
Fuel tank capacity
40 - 66 L

Dimensions and Body
Body Type
Estate
Body Type
Estate
Seats
5
Seats
5
Doors
5
Doors
5
Curb weight
1865 - 2240 kg
Curb weight
1755 - 2235 kg
Trunk capacity
404 - 503 L
Trunk capacity
360 - 490 L
Length
4999 mm
Length
4751 - 4842 mm
Width
1875 mm
Width
1820 - 1900 mm
Height
1472 mm
Height
1454 - 1494 mm
Max trunk capacity
1497 - 1534 L
Max trunk capacity
1375 - 1510 L
Payload
535 - 570 kg
Payload
440 - 565 kg

Engine and Performance
Engine Type
Petrol, Petrol MHEV, Diesel MHEV, Plugin Hybrid
Engine Type
Petrol MHEV, Plugin Hybrid, Diesel MHEV
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Dual-Clutch Automatic
Transmission Detail
Automatic Gearbox
Drive Type
Front-Wheel Drive, All-Wheel Drive
Drive Type
Rear-Wheel Drive, All-Wheel Drive
Power HP
204 - 367 HP
Power HP
186 - 680 HP
Acceleration 0-100km/h
4.7 - 8.3 s
Acceleration 0-100km/h
3.4 - 8.8 s
Max Speed
238 - 250 km/h
Max Speed
226 - 280 km/h
Torque
340 - 550 Nm
Torque
250 - 1020 Nm
Number of Cylinders
4 - 6
Number of Cylinders
4
Power kW
150 - 270 kW
Power kW
137 - 500 kW
Engine capacity
1968 - 2995 cm3
Engine capacity
1496 - 1999 cm3

General
Model Year
2025
Model Year
2024 - 2025
CO2 Efficiency Class
F, D, E, B
CO2 Efficiency Class
E, F, G, B, D
Brand
Audi
Brand
Mercedes-Benz

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Is the Audi A6 Avant offered with different drivetrains?

The Audi A6 Avant is available as Front-Wheel Drive or All-Wheel Drive.

The prices shown are estimates based on German list prices, adjusted for local VAT. Local registration taxes (e.g. NoVA, BPM or CO2 malus) are not included. This information is not legally binding.