How reliable is the Mercedes-Benz Motorhome compared with other cars?

We do not publish a comparison for the Mercedes-Benz Motorhome, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 72.0% across 547 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.

What do testers most often warn about on a Mercedes-Benz Motorhome?

The most common advisory is "Brake pipe damaged or excessively corroded", noted on 15.4% of all Mercedes-Benz Motorhome tests. An advisory is not a failure: it flags something that will likely need attention before the next test.

What mileage does a Mercedes-Benz Motorhome usually have at its MOT?

The average odometer reading recorded at test is 90,475 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

Model reliability file

Mercedes-Benz Motorhome MOT pass rate & common failures

From 547 recorded MOT tests of the Mercedes-Benz Motorhome, published by DVSA.

Data updated 29 July 2026

Quick answer

Across 547 MOT tests, 72.0% of Mercedes-Benz Motorhome tests ended in a pass. This figure is not adjusted for age or mileage, so it is not a reliability ranking: the Mercedes-Benz Motorhome fleet does not yet cover a wide enough spread of ages and distances to compare it fairly against other models. Its most commonly recorded failure is lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, which appears in 16.4% of failed tests. Cars of this model average 90,475 miles on the odometer when tested.

At a glance

Recorded pass rate

72.0%unadjusted, not comparable547 tests

We are not publishing a ranking for the Motorhome. The examples tested do not cover a wide enough spread of ages and mileages to compare it fairly, and an unadjusted pass rate mostly sorts models by how recently they were bought rather than how well they were built. The failure and advisory patterns below come from the same 547 tests and are worth reading on their own terms.

DVSA recorded wording

Most common failure items

Share of failed Mercedes-Benz Motorhome tests in which each item was recorded. One failed test often lists several items, so these do not sum to 100%.

1.A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning16.4%
21 occurrencesLamp not working explained
2.A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning14.8%
19 occurrencesLamp not working explained
3.Parking brake efficiency below minimum requirement14.1%
18 occurrencesParking brake efficiency too low explained
4.An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning14.1%
18 occurrencesLamp not working explained
5.The aim of a headlamp is not within limits laid down in the requirements11.7%
15 occurrencesHeadlamp aim incorrect explained
6.A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED11.7%
15 occurrencesHeadlamp not working explained
7.Brake pipe damaged or excessively corroded11.7%
15 occurrencesBrake pipe corroded explained
8.Wiper blade missing or obviously not clearing the windscreen8.6%
11 occurrencesWiper or washer not working properly explained
9.Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning8.6%
11 occurrencesStop lamp not working explained
10.Windscreen washers not working or not providing sufficient fluid to clear the windscreen7.0%
9 occurrencesWiper or washer not working properly explained

Warnings without a failure

Most common advisories

Share of all Mercedes-Benz Motorhome tests carrying each advisory. The denominator differs from the failure list above because an advisory can be issued on a car that passed.

1.Brake pipe damaged or excessively corroded15.4%
84 testsBrake pipe corroded explained
2.Brake disc or drum excessively weakened, insecure or fractured15.2%
83 testsBrake disc worn, pitted or scored explained
3.A suspension pin, bush or joint excessively worn12.6%
69 testsSuspension arm bush worn explained
4.A tyre seriously damaged9.9%
54 testsTyre damaged or deteriorated explained
5.A suspension pin, bush or joint excessively worn5.5%
30 testsSuspension arm bush worn explained
6.Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users4.4%
24 tests
7.Exhaust system leaking or insecure3.8%
21 testsExhaust leaking or insecure explained
8.A brake hose ferrule excessively corroded3.7%
20 testsBrake hose deteriorated, damaged or chafing explained

What gets tested

The Motorhome fleet

Average mileage recorded at test: 90,475
Fuel mix of tested cars: Diesel99.6%

Check a specific Mercedes-Benz Motorhome

A model average tells you the pattern. Its own MOT record tells you the car.

Compare within the range

Other Mercedes-Benz models

Mercedes-Benz A-Class — 73.3% adjusted
Mercedes-Benz C-Class — 77.0% adjusted
Mercedes-Benz E-Class — 78.5% adjusted
Mercedes-Benz GLA — 82.3% adjusted
Mercedes-Benz Vito — 71.0% adjusted
Mercedes-Benz GLC — 85.9% adjusted
All Mercedes-Benz models

Common questions

How reliable is the Mercedes-Benz Motorhome compared with other cars?: We do not publish a comparison for the Mercedes-Benz Motorhome, because the cars of this model that have been tested do not cover a wide enough range of ages and mileages. Its raw pass rate is 72.0% across 547 tests, but comparing a raw rate between models mostly ranks them by how new they are rather than how good they are. The failure and advisory patterns further down the page are still drawn from real tests and are worth reading.
What is the most common MOT failure on a Mercedes-Benz Motorhome?: The item recorded most often is "A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning", which appears in 16.4% of failed Mercedes-Benz Motorhome tests. Because one failed test can list several items, these shares do not add up to 100%.
What do testers most often warn about on a Mercedes-Benz Motorhome?: The most common advisory is "Brake pipe damaged or excessively corroded", noted on 15.4% of all Mercedes-Benz Motorhome tests. An advisory is not a failure: it flags something that will likely need attention before the next test.
What mileage does a Mercedes-Benz Motorhome usually have at its MOT?: The average odometer reading recorded at test is 90,475 miles. This is the mileage across all tested examples of every age, not an annual figure, so treat it as a description of the fleet rather than a target for one car.

How this was worked out

Method and limits

Figures come from the DVSA anonymised MOT testing dataset, published under the Open Government Licence. Only class 4 initial tests are counted: retests are excluded so a car appears once, and abandoned tests are excluded entirely. No adjusted rate is shown because this model's tested examples do not cover enough of the national age and mileage range for standardisation to mean anything.

An MOT measures whether a car met a legal standard on the day. It is not a breakdown record, a service history or a running-cost estimate, and a pass rate is a property of a fleet rather than a prediction about one car.