Mercedes C class is more dynamic to drive. Mercedes C class engine produces 62 HP more power than BMW 3 series, whereas torque is 90 NM more than BMW 3 series. Thanks to more power Mercedes C class reaches 100 km/h speed 3.1 seconds faster.
Fuel consumption
Fuel consumption (l/100km):
8.1
6.4
The BMW 3 series is a better choice when it comes to fuel economy. Mercedes C class consumes 1.7 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 255 litres more fuel.
Engines
Average engine lifespan:
440'000 km
330'000 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:
13 years
6 years
Engine spread:
Installed on at least 3 other car models, including Mercedes E klase, Mercedes CLK, Mercedes SLK
Used also on BMW 1 sērija
In general, the longer and for more car models an engine is produced, the better its serviceability and availability of spare parts. Mercedes C class might be a better choice in this respect.
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.
