MERCEDES B (2018)
Running costs, common problems, and reliability data based on 114 real MOT tests in 2024.
MOT Pass Rate
91%
Total Tests (2024)
114
Avg Mileage
36,999 mi
Est. Annual Cost
£1,582
Is the 2018 MERCEDES B reliable?
Excellent reliability. Very few MOT failures. That's 9 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 6 years old, 91% of MERCEDES Bs from 2018 passed their MOT first time in 2024. That's based on 114 tests across the UK. The average mileage at this age is 36,999 miles.
How does the 2018 MERCEDES B compare?
Mileage Analysis
The average 2018 MERCEDES B has 36,999 miles on the clock, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.
Best year to buy a MERCEDES B?
The most reliable year is the 2021 model with a 95% MOT pass rate, while the 2018 model has the lowest at 91%. Consider a different year if reliability is a priority.
How much does a 2018 MERCEDES B cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES B by Year
Checking a specific MERCEDES B?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2018 MERCEDES B
The 2018 MERCEDES B is a small family car with a 1595cc petrol engine. 114 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 2018, the average MOT pass rate is 89%, and this model beats that benchmark.
With an average of 36,999 miles at 6 years old, MERCEDES B owners drive about as much as the UK average.
2018 MERCEDES B Fuel Costs
The 1595cc petrol engine offers a reasonable balance between performance and economy. Expect around 42 mpg in mixed driving, which works out to roughly £1,137 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2018 MERCEDES B?
Total estimated annual running cost is £1,582 (£132/month), broken down as £1137 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 91% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES B Reliability Trend
The MERCEDES B has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Buying a Used 2018 MERCEDES B
At 6 years old, the MERCEDES B offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Alternatives to the 2018 MERCEDES B
The MERCEDES B is actually the most reliable option among similar petrol small family cars from this era. Here are comparable petrol cars with similar engines:
- VAUXHALL CORSA (2016) 81% pass rate (-10%) from 133,045 tests
- FORD FOCUS (2016) 87% pass rate (-4%) from 109,880 tests
- NISSAN QASHQAI (2017) 86% pass rate (-5%) from 100,176 tests
- VOLKSWAGEN POLO (2016) 84% pass rate (-7%) from 92,860 tests