Mercedes-Benz Viano MOT pass rate: 72.7% (4,989 tests, 2025)

The Mercedes-Benz Viano passed 72.7% of its 4,989 MOT tests in 2025 — 4.8 points below the UK average of 77.5%. The median tested example was 15 years old with 139,681 miles on the clock.

72.7%Pass rate (2025)

4,989MOT tests analysed

139,681 miMedian mileage at test

15 yrsMedian age at test

How the Viano compares

Mercedes-Benz Viano

72.7%

UK average (all Class 4 vehicles)

77.5% across 33.1 million tests

Mercedes-Benz average (all models)

80.7%

What fails most on the Mercedes-Benz Viano

Across failed and rectified tests in 2025, these vehicle systems produced the most defects on the Viano:

#	System	Defects recorded	Share
1	Lamps, reflectors and electrical equipment	1,048	26.3%
2	Brakes	959	24.1%
3	Suspension	741	18.6%
4	Tyres	371	9.3%
5	Body, chassis, structure	315	7.9%
6	Visibility	201	5.0%

Pre-MOT checklist for Viano owners

Based on the failure profile above, ten minutes with a torch before your test removes the most likely fail items:

Walk round with all lights on: one blown bulb is the most avoidable fail there is
Feel for a spongy pedal or pulling to one side; check pad wear through the wheel spokes if visible
Bounce each corner and listen for clonks over speed bumps — suspension is this model’s (and the UK’s) top failure system
Check tread with the 20p test and inspect sidewalls for cracking — tyres close to the limit are the country’s most common advisory
Look underneath for corrosion around sills and subframes, especially on older cars

Check the engine before the tester does

A stored fault code with the engine light on is an automatic Major defect. Scan and clear resolved faults before booking.

Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
Autel UK testersAutel professional-grade diagnostic testers

Viano pass rate by registration year

Registration year	Tests	Pass rate	Vs same-age	Median mileage
2012	1,692	73.3%	+2.1 pts	138,892
2013	1,959	73.3%	-0.1 pts	127,650
2014	1,943	75.2%	-0.6 pts	124,905

Check a specific Viano before you buy

Pass rates describe the model; they can’t tell you about the one car you’re looking at. Run its plate through our free MOT history check to see its personal record of failures, advisories and mileage readings.

Other Mercedes-Benz models

C78.2% pass rate · 343,551 tests A-Class77.8% pass rate · 232,671 tests E79.7% pass rate · 215,896 tests A89.1% pass rate · 93,733 tests Vito73.4% pass rate · 81,263 tests GLC87.2% pass rate · 65,847 tests GLA83.1% pass rate · 64,404 tests CLA82.7% pass rate · 62,279 tests

FAQs

What is the MOT pass rate for a Mercedes-Benz Viano?

In 2025, 72.7% of 4,989 first MOT tests on the Mercedes-Benz Viano were passes (UK average: 77.5%). Data: DVSA anonymised MOT results.

What does the Viano fail its MOT on most?

The biggest defect group is lamps, reflectors and electrical equipment (26.3% of its recorded defects), followed by brakes.

Is the Mercedes-Benz Viano reliable?

MOT pass rate is one lens on durability: at 72.7% it performs below the national average at a median age of 15 years and 139,681 miles. Always check the individual car's history too.

Source: DVSA Anonymised MOT tests and results, 2025 extract (Class 4 initial tests only; retests excluded). Contains public sector information licensed under the Open Government Licence v3.0. Figures rounded to one decimal place.