Mercedes Hymer (2021)

Estimated running costs and MOT pass rates from 84 MOT tests in 2024.

Annual Cost

£2,131

£178/month

MOT Pass Rate

96%

Excellent

Road Tax

£200

Standard rate/year

Est. Insurance

n/a

2143cc Diesel

Great Choice

96% pass rate, £2,131/year to run. 14 points above average.

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Diesel2143cc5 years old84 tests15k miles avg

Annual Running Costs

Fuel (Diesel, 2143cc)

~40 mpg

£1,676

Road Tax

Car rate estimate; motorhomes are taxed differently

£200

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£2,131

Per month£178/mo

Per week£41/wk

Estimates based on 7,400 miles/year (UK average), diesel at 199.33p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).

Reliability Verdict

96% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 14 points above the average of 82% across all models in our data. It also outperforms the Mercedes brand average of 87%.

96% of MOT tests on Mercedes Hymers from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 84 tests across the UK, retests included. The average mileage recorded at those tests was 15,168 miles.

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How Does It Compare?

Rank among 2021 models649th of 3,336(top 20%)

Rank among Mercedes models191st of 1,376(top 14%)

vs average of all models+14%(82% avg)

vs 2021 models average+4%(92% avg)

vs Mercedes average+9%(87% avg)

Mileage Analysis

15,168

Average miles

22,200

Expected for age

The average 2021 Mercedes Hymer had 15,168 miles on the clock at its 2024 MOT, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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Best Year to Buy?

Of the years with at least 100 tests, the 2020 model has the highest MOT pass rate at 97%, while the 1993 model has the lowest at 70%. The 2021 scores 96%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

Mercedes Hymer by Year

Year	Pass Rate	Tests	Avg Mileage
2021	96%	84	15,168 mi
2020	97%	114	15,102 mi
2019	93%	131	17,256 mi
2018	93%	124	24,392 mi
2017	93%	115	24,882 mi
2016	93%	56	26,923 mi
2015	100%	32	49,884 mi
2006	84%	44	72,538 mi
2004	81%	37	86,573 mi
2003	90%	49	67,183 mi
2002	82%	44	72,456 mi
2001	78%	45	84,193 mi
1998	83%	40	78,746 mi
1994	73%	45	128,584 mi
1993	70%	104	158,587 mi
1992	74%	34	133,318 mi
1990	71%	35	107,692 mi

Similar Cars to Consider

Ford Transit Custom

2019 · 2000cc Diesel

£2,002/year

87%

-9%

Volkswagen Transporter

2019 · 1968cc Diesel

£2,002/year

88%

-8%

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About the 2021 Mercedes Hymer

The 2021 Mercedes Hymer is a motorhome. Our records list a 2143cc diesel engine, though engines vary between versions. 84 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It ranks in the top 20% of all 2021 models for MOT pass rate.

With an average of 15,168 miles recorded at its 2024 MOT tests, Mercedes Hymer owners tend to use this car less than the typical driver.

2021 Mercedes Hymer Fuel Costs

The 2143cc diesel engine offers a reasonable balance between performance and economy. Expect around 40 mpg in mixed driving, which works out to roughly £1,676 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.

What does it cost to own a 2021 Mercedes Hymer?

Total estimated annual running cost is £2,131 (£178/month), broken down as £1,676 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 96% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Mercedes Hymer Reliability Trend

Newer Mercedes Hymers pass their MOT more often than older ones, by 13 percentage points on average, which is mostly down to age and wear.

Buying a Used 2021 Mercedes Hymer

At 5 years old, the Mercedes Hymer offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2020 model has the highest pass rate at 97%. Note: with only 84 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Medium risk

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

AdBlue System

Medium risk

Post-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.

EGR Valve

Low risk

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

Dual Mass Flywheel

Medium risk

Larger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.

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 2021 Mercedes Hymer stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Mercedes Hymer(2021)	96%	£1,676	£200	n/a	£2,131
Ford Transit Custom(2019)	87%	£1,397	£200	n/a	£2,002-£129
Volkswagen Transporter(2019)	88%	£1,397	£200	n/a	£2,002-£129

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2021 Mercedes Hymer

Is the 2021 Mercedes Hymer reliable?

Excellent reliability. Very few MOT failures. 96% of MOT tests on 2021 Mercedes Hymers ended in a pass, from 84 tests (DVSA MOT data for tests in 2024, retests included). That's 14 points above the average of 82% across all models in the same data.

How much does a 2021 Mercedes Hymer cost to run?

Our estimate is £2,131 a year (£178 a month): £1,676 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2021 Mercedes Hymer?

96% of 84 MOT tests on the 2021 Mercedes Hymer ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 649th of 3,336 models first registered in 2021 (top 20%).

Which year Mercedes Hymer has the best MOT pass rate?

Of the years with at least 100 tests, the 2020 Mercedes Hymer has the highest MOT pass rate at 97% and the 1993 the lowest at 70%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2021 Mercedes Hymer?

The average mileage recorded at MOT tests on the 2021 Mercedes Hymer is 15,168 miles, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.