How much does a 2018 MERCEDES B-CLASS cost to run?

Estimated annual running cost is £1,587 (£132/month), including £1137 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2018 MERCEDES B-CLASS?

The 2018 MERCEDES B-CLASS has a 90% MOT pass rate based on 6,729 tests in 2026. This ranks 342 out of 649 cars from 2018.

Which year MERCEDES B-CLASS is most reliable?

The 2019 MERCEDES B-CLASS has the highest MOT pass rate at 93%. The least reliable year is 2006 at 71%.

MERCEDES B-CLASS (2018)

Q: Is the 2018 MERCEDES B-CLASS reliable?

Excellent reliability. Very few MOT failures. 90% of MERCEDES B-CLASSs from 2018 passed their MOT first time in 2026, based on 6,729 tests. That's 8 points above the national average of 82%.

Q: What is the average mileage for a 2018 MERCEDES B-CLASS?

The average mileage for a 2018 MERCEDES B-CLASS is 39,021 miles, which is below the expected 59,200 miles for a 8-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 6,729 real MOT tests.

Annual Cost

£1,587

£132/month

MOT Pass Rate

90%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 12-25

1595cc Petrol

Great Choice

90% pass rate, £1587/year to run. 8 points above average.

Buying this car? Check for finance, write-offs & theft

£4.99

Check a specific MERCEDES B-CLASS

Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.

Petrol1595cc8 years old6,729 tests39k miles avg

Annual Running Costs

Fuel (Petrol, 1595cc)

~42 mpg

£1,137

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,587

Per month£132/mo

Per week£31/wk

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.

🛡️

Get an insurance quote for this MERCEDES B-CLASS

Compare quotes and find the best deal

Reliability Verdict

90% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 8 points above the national average of 82%.

At 8 years old, 90% of MERCEDES B-CLASSs from 2018 passed their MOT first time in 2026. That's based on 6,729 tests across the UK. The average mileage at this age is 39,021 miles.

Got a MERCEDES B-CLASS you're looking at?

Enter the reg plate to check its specific MOT history, mileage, and health score.

How Does It Compare?

Rank among 2018 cars342th of 649(top 53%)

Rank among MERCEDES models621th of 1,408(top 44%)

vs national average+8%(82% avg)

vs 2018 cars average+1%(89% avg)

vs MERCEDES average+3%(87% avg)

Mileage Analysis

39,021

Average miles

59,200

Expected for age

The average 2018 MERCEDES B-CLASS has 39,021 miles on the clock, which is below the expected 59,200 miles for a 8-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Looking at a specific MERCEDES B-CLASS?

Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.

Best Year to Buy?

The most reliable year is the 2019 model with a 93% MOT pass rate, while the 2006 model has the lowest at 71%. The 2018 sits between the two at 90%.

MERCEDES B-CLASS by Year

Year	Pass Rate	Tests	Avg Mileage
2020	98%	47	23,364 mi
2019	93%	912	29,781 mi
2018	90%	6,729	39,021 mi
2017	88%	9,693	48,392 mi
2016	87%	9,657	55,381 mi
2015	86%	9,871	64,066 mi
2014	83%	15,382	72,344 mi
2013	82%	13,421	78,118 mi
2012	81%	11,092	83,827 mi
2011	73%	6,779	84,302 mi
2010	74%	8,819	90,612 mi
2009	74%	8,277	95,335 mi
2008	71%	6,925	100,673 mi
2007	72%	5,184	101,539 mi
2006	71%	4,235	103,535 mi
2005	73%	805	105,799 mi

Similar Cars to Consider

VAUXHALL CORSA

2016 · 1398cc Petrol

£1,572/year

81%

-9%

FORD FOCUS

2016 · 1596cc Petrol

£1,677/year

87%

-3%

NISSAN QASHQAI

2017 · 1200cc Petrol

£1,550/year

86%

-4%

VOLKSWAGEN POLO

2016 · 1198cc Petrol

£1,390/year

84%

-6%

Check a Specific Mercedes B-class

Enter a reg plate to get the full MOT history, health score, and mileage verification.

Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.

About the 2018 MERCEDES B-CLASS

The 2018 MERCEDES B-CLASS is a small family car with a 1595cc petrol engine. 6,729 of these vehicles were MOT tested in 2026, making it a reasonably common sight 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 39,021 miles at 8 years old, MERCEDES B-CLASS owners tend to use this car less than the typical driver.

2018 MERCEDES B-CLASS 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-CLASS?

Total estimated annual running cost is £1,587 (£132/month), broken down as £1137 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 90% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

MERCEDES B-CLASS Reliability Trend

Newer MERCEDES B-CLASSs show better MOT pass rates than older ones, with an average improvement of 14 percentage points.

Buying a Used 2018 MERCEDES B-CLASS

At 8 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. If you're flexible on year, the 2019 model has the highest pass rate at 93%. With 6,729 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

Based on the 2018 MERCEDES B-CLASS's fuel type, age, and engine size, these are the most likely problem areas to check.

Suspension Wear

Medium risk

Shock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2018 MERCEDES B-CLASS stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
MERCEDES B-CLASS(2018)	90%	£1137	£195	Grp 12-25	£1587
VAUXHALL CORSA(2016)	81%	£1137	£30	Grp 8-20	£1572-£15
FORD FOCUS(2016)	87%	£1137	£135	Grp 12-25	£1677+£90
NISSAN QASHQAI(2017)	86%	£955	£190	Grp 5-15	£1550-£37
VOLKSWAGEN POLO(2016)	84%	£955	£30	Grp 5-15	£1390-£197

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.