MOT reliability

Mercedes-benz R-class

4,432 vehicles · 63,091 completed MOT tests analysed

78%

MOT pass rate

Based on 4,432 Mercedes-benz R-class vehicles and 63,091 completed MOT tests, the Mercedes-benz R-class has an overall 78% pass rate, with an average recorded mileage of 129,066 miles.

4,432

Vehicles

63,091

MOT tests

8,947

Avg miles / year

1.7

Faults per test

Dangerous-fault share

Mercedes-benz R-class problem areas

Where faults occur most across all Mercedes-benz R-class MOT tests:

Other57%
Brakes18%
Tyres, wheels & suspension17%
Emissions & nuisance7%
Lamps & electrical6%
Body & structure5%
Steering2%
Visibility2%

Mercedes-benz R-class pass rate by age

How the Mercedes-benz R-class's MOT pass rate changes as it ages (buckets with 20+ tests).

Age (years)	Tests	Pass rate
1	32	97%
2	187	87%
3	5,057	84%
4	5,039	83%
5	5,035	82%
6	5,117	80%
7	5,073	79%
8	5,023	79%
9	4,972	78%
10	4,893	76%
11	4,683	76%
12	4,406	75%
13	3,776	75%
14	3,107	75%
15	2,424	75%
16	1,720	74%
17	1,241	74%
18	801	73%
19	388	77%
20	102	76%

Fuel types: Diesel (4,004), Petrol (424), LPG (4)

Most common Mercedes-benz R-class MOT faults

These are the faults and advisories recorded most often across Mercedes-benz R-class MOT tests:

Oil leak, but not excessive (8.4.1 (a) (i)) (4,038 times)
Under-trays fitted obscuring some underside components (2,001 times)
Nearside Front Tyre worn close to the legal limit (4.1.E.1) (1,819 times)
Offside Front Tyre worn close to the legal limit (4.1.E.1) (1,755 times)
Nearside Rear Tyre worn close to the legal limit (4.1.E.1) (1,667 times)
Engine covers fitted obscuring some components in the engine bay (1,614 times)
Offside Rear Tyre worn close to the legal limit (4.1.E.1) (1,582 times)
Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e)) (1,504 times)
Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e)) (1,439 times)
Nearside Rear Brake pipe corroded, covered in grease or other material (1.1.11 (c)) (1,302 times)
Offside Rear Brake pipe corroded, covered in grease or other material (1.1.11 (c)) (1,226 times)
Front Brake pad(s) wearing thin (3.5.1g) (1,212 times)
Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e)) (1,126 times)
Nearside Front Outer Drive shaft joint constant velocity boot severely deteriorated (6.1.7 (g) (i)) (1,110 times)
Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e)) (1,105 times)

Mercedes-benz R-class pass rate by registration year

Year	Vehicles	Tests	Pass rate	Avg mileage
2013	176	2,044	83%	115,779
2012	331	4,222	82%	123,157
2011	451	6,037	81%	125,838
2010	318	4,483	79%	130,372
2009	321	4,890	78%	134,103
2008	621	9,088	78%	131,209
2007	1,024	15,389	77%	133,934
2006	1,174	16,755	78%	127,164
2005	15	179	78%	111,079

Mercedes-benz R-class reliability FAQ

Across 4,432 Mercedes-benz R-class vehicles in our MOT data, 78% pass the MOT (a 22% failure rate), with about 1.7 faults or advisories recorded per test.

The most frequently recorded Mercedes-benz R-class MOT issues are: Oil leak, but not excessive (8.4.1 (a) (i)); Under-trays fitted obscuring some underside components; Nearside Front Tyre worn close to the legal limit (4.1.E.1).

The typical Mercedes-benz R-class in our data has covered around 129,066 miles.

Compare the Mercedes-benz R-class

See how the Mercedes-benz R-class stacks up against other Mercedes-benz models on MOT reliability:

R-class vs C R-class vs E R-class vs Sprinter R-class vs A-class

Check a specific Mercedes-benz R-class

Enter a registration to see that exact vehicle's full MOT history, advisories and recurring faults.

See all Mercedes-benz models · Learn about common MOT failures · what an MOT checks