Registered new in Europe in 2021
The largest markets were Germany (10,417), France (3,695), Italy (2,821).
- Average mass
- 1,543 kg
- Average CO₂
- 108 g/km (WLTP)
- Average power
- 108 kW
- Fuel type recorded
- Diesel 37% · Petrol 36% · Petrol/electric 27%
European Environment Agency, CO₂ emissions from new passenger cars · averages weighted by registrations; CO₂ is the type-approval value; fuel type as recorded at registration, where many non-plug-in hybrids appear as petrol · re-use permitted with acknowledgement
Real-world fuel consumption
13,241 Mercedes-Benz B-Class cars first registered in Europe in 2021 report their fuel use through the on-board meter. Diesel versions use 5.7 l/100 km on the road against 5.2 in the WLTP test (+11%).
| Fuel | Cars | On the road | WLTP | Difference |
|---|---|---|---|---|
| Petrol | 3,921 | 7.2 | 6.2 | +15% |
| Diesel | 5,559 | 5.7 | 5.2 | +11% |
| Plug-in hybrid | 3,761 | 4.2 | 1.2 | +267% |
Litres per 100 km from the cars' own fuel meters (OBFCM), collected in 2024; the year is the year of first registration. All years together · European Environment Agency · CC BY 4.0
Engines
The most common engines in 2021 Mercedes-Benz B-Class cars on Dutch roads are the 1.3 hybrid (118 kW, 158 hp), 1.3 petrol (100 kW, 134 hp) and 2.0 diesel (110 kW, 148 hp), out of 6 versions with at least 20 cars.
| Engine | Power | Cars |
|---|---|---|
| 1.3 hybrid | 118 kW 158 hp | 586 |
| 1.3 petrol | 100 kW 134 hp | 332 |
| 2.0 diesel | 110 kW 148 hp | 204 |
| 1.3 petrol | 120 kW 161 hp | 177 |
| 2.0 petrol | 140 kW 188 hp | 27 |
| 1.3 petrol | 80 kW 107 hp | 20 |
RDW Open Data (CC0): registered passenger cars and their fuel data · engine size rounded to 0.1 litre, net maximum power · versions with at least 20 cars
Other years
New registrations in Europe by year (European Environment Agency) · a year gets its own page when at least three European sources cover it
In the Netherlands
1,385 first registered in 2021 are on Dutch roads; 39% arrived later as imports. Median list price when new: €46,680.
Most common APK defects
- Bandenspanning niet op juiste waarde417
- Dimlicht onjuist afgesteld126
- Band onvoldoende profiel97
- Band beschadigd74
- Band(en) aanwezig met een profieldiepte van 1,6 t/m 2,5 mm66
- Gordel beschadigd61
- Stofhoes aandrijfas beschadigd en dicht niet af51
- Ruitenwisserinstallatie geeft onvoldoende zicht31
Colours
RDW Open Data: registered vehicles and APK defects (CC0) · defect descriptions in the RDW's Dutch wording
In the United Kingdom
1,725 cars built in 2021 were licensed for the road at the end of 2025, and 9 more were declared off the road (SORN).
Department for Transport and DVLA, vehicle licensing statistics (table VEH0124, year of manufacture) · Open Government Licence v3.0
In Finland
188 of these cars first registered in 2021 were in use in Finland on 30 Jun 2026, with an average of 57,000 km on the odometer at their last inspection.
Traficom (Finnish Transport and Communications Agency), open data on vehicles in use · CC BY 4.0
In New Zealand
34 2021 cars are on the New Zealand register.
NZ Transport Agency Waka Kotahi, Motor Vehicle Register (March 2026) · CC BY 4.0
Recalls in Canada
2 Transport Canada recalls for the 2021 Mercedes-Benz B-Class.
| 2021064 12 Feb 2021 | Electrical Issue: On certain vehicles equipped with the emergency calling (eCall) system, the communications module may temporarily lose power during a crash. If this ha… |
| 2021041 1 Feb 2021 | Accessories Issue: On certain vehicles, a software problem could cause the rearview camera image not to appear on the central display. Canadian regulations require the re… |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada