BMW 3 series is more dynamic to drive. BMW 3 series engine produces 21 HP more power than Mercedes C class, whereas torque is 10 NM more than Mercedes C class. Thanks to more power BMW 3 series reaches 100 km/h speed 1.6 seconds faster.
Fuel consumption
Fuel consumption (l/100km):
5.7
6.9
Real fuel consumption:
7.1 l/100km
8.5 l/100km
The BMW 3 series is a better choice when it comes to fuel economy. By specification BMW 3 series consumes 1.2 litres less fuel per 100 km than the Mercedes C class, which means that by driving the BMW 3 series over 15,000 km in a year you can save 180 litres of fuel. By comparing actual fuel consumption based on user reports, BMW 3 series consumes 1.4 litres less fuel per 100 km than the Mercedes C class.
Engines
Engine production duration:
17 years
20 years
Engine spread:
Installed on at least 4 other car models, including BMW 5 sērija, BMW X5, BMW 7 sērija, BMW X6
Installed on at least 9 other car models, including Mercedes E klase, Mercedes ML, Mercedes G klase
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.
