Mercedes C class is more dynamic to drive. Mercedes C class engine produces 28 HP more power than BMW 3 series, whereas torque is 35 NM more than BMW 3 series. Thanks to more power Mercedes C class reaches 100 km/h speed 0.3 seconds faster.
Fuel consumption
Fuel consumption (l/100km):
7.1
6.8
Mercedes C class consumes 0.3 litres more fuel per 100 km than the BMW 3 series, which means that if you drive 15,000 km in a year, the Mercedes C class could require 45 litres more fuel.
Fuel tank capacity:
62 litres
63 litres
Full fuel tank distance:
870 km in combined cycle
920 km in combined cycle
1100 km on highway
1140 km on highway
BMW 3 series gets more mileage on one fuel tank.
Engines
Average engine lifespan:
560'000 km
420'000 km
Engine resource depends largely on regular maintenance and the quality of the oils and fuels used, but under equal conditions the average life of a Mercedes C class engine could be longer.
Engine production duration:
9 years
9 years
Engine spread:
Used also on Mercedes E klase
Installed on at least 2 other car models, including BMW 1 sērija, BMW X3
In general, the longer and for more car models an engine is produced, the better its serviceability and availability of spare parts. BMW 3 series might be a better choice in this respect.
Dimensions
Length:
4.54 m
4.48 m
Width:
1.73 m
1.74 m
Height:
1.46 m
1.41 m
Mercedes C class is 6 cm longer than the BMW 3 series, 1 cm narrower, while the height of Mercedes C class is 5 cm higher.
Mercedes C class has slightly fewer faults. Deffect rate in annual technical inspection is similar for both cars, it's slightly higher for BMW 3 series, so Mercedes C class quality could be a bit better.
