Mercedes-Benz Viano MOT Pass Rate & Official DVSA Failure Statistics

Mercedes-Benz Viano MOT History and Failure Rates vs UK National Average

The Mercedes-Benz Viano passed on its first attempt in 72.0%, and its overall record sits −3.6 percentage points below the national average for all cars. These figures come from every recorded DVSA MOT test for the Mercedes-Benz Viano in the 2023–2025 data: 19,833 tests across 12 model years (2004–2015). A test still carries exactly one pass or fail verdict.

Figures are computed from every recorded DVSA test for this model in the 2023–2025 data.

Most Common Mercedes-Benz Viano MOT Problems by Failure Category

Every MOT failure a tester records belongs to one inspection section of the DVSA manual. For the Mercedes-Benz Viano, the Lamps, reflectors and electrical equipment section leads the record — the breakdown below shows where the recorded failures cluster, then the exact strings behind the three biggest sections.

Shares are over the Mercedes-Benz Viano's recorded defect strings, merged across its year pages.

Top Recorded Mercedes-Benz Viano DVSA MOT Test Statistics & Defect Descriptions

The descriptions below are the exact DVSA failure strings testers recorded most often for the Mercedes-Benz Viano, each with how many of the model's 19,833 tests it was noted on.

• "Windscreen damaged but not adversely affecting driver's view" (Minor) — noted on about 1,049 Mercedes-Benz Viano tests, 5.3% of the model's MOT record.
• "Registration plate lamp(s) inoperative in the case of multiple lamps or light sources" (Minor) — noted on about 809 Mercedes-Benz Viano tests, 4.1% of the model's MOT record.
• "Rbt (sp) efficiency below requirements" (Major) — noted on about 571 Mercedes-Benz Viano tests, 2.9% of the model's MOT record.
• "Headlamp lens slightly defective" (Minor) — noted on about 413 Mercedes-Benz Viano tests, 2.1% of the model's MOT record.
• "Side repeaters not working" (Major) — noted on about 359 Mercedes-Benz Viano tests, 1.8% of the model's MOT record.
• "Srs malfunction indicator lamp warning lamp indicates a fault" (Major) — noted on about 342 Mercedes-Benz Viano tests, 1.7% of the model's MOT record.

Best and Worst Mercedes-Benz Viano Model Years by Pass Rate

The strongest Mercedes-Benz Viano model year on record is 2014 (79.7% across 2,394 tests), and the weakest is 2005 (73.6%). The gap between them is 6.1 points. Years with fewer than 50 recorded tests are excluded, so these are the years with enough MOT history to mean something.

Newest model year first. Only years with at least 50 recorded tests are listed.

Pre-MOT Inspection Checklist for Mercedes-Benz Viano Owners

These checks follow this Mercedes-Benz Viano's own most-recorded failure strings, starting with what a tester is most likely to flag on a Mercedes-Benz Viano.

• the windscreen — “windscreen damaged”

  Check the driver’s side of the screen within the swept area for chips and cracks; anything larger than 10mm in the driver’s central view is a fail. Most chips can be resin-repaired for far less than a new screen.

• the lights — “registration plate lamp(s) inoperative in the case of multiple lamps or light sources”

  Switch everything on and walk round the car: both headlamps on dip and main, every indicator, both brake lights, reverse, fog and the two number-plate lamps. A bulb is a few pounds and a five-minute job.

• the suspension joints — “ball joint dust cover severely deteriorated”

  With the car parked on level ground, rock the top of each front wheel in and out while someone watches the suspension arm. Clunks, or rubber boots split and greasy, are what testers record here.

Derived from the DVSA failure strings testers recorded for the Mercedes-Benz Viano. A check that finds nothing means the item is likely fine, not that the test is guaranteed.

Frequently Asked Questions: Mercedes-Benz Viano MOT & Reliability