Pass rate, every year
92.3% Above average
22,051 tests across 4 model years, 2020–2023.
+11.3 pts vs the national average
Mercedes-Benz Glb MOT Pass Rate & Official DVSA Failure Statistics
Best year to buy
2023 96.9%
The strongest of the 4 years on record. See the 2023 page →
Worst year to buy
2020 91.3%
5.6 points below the 2023 peak. See the 2020 page →
The Mercedes-Benz Glb MOT pass rate is 92.3%, +11.3 percentage points above the UK average. That is 22,051 DVSA MOT tests recorded between 2020 and 2023. This page lists the most common Mercedes-Benz Glb MOT failures by category, names the best and worst model years, and finishes with a pre-MOT checklist you can run at home.
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Mercedes-Benz Glb MOT History and Failure Rates vs UK National Average
The Mercedes-Benz Glb passed on its first attempt in 91.8%, and its overall record sits +11.3 percentage points above the national average for all cars. These figures come from every recorded DVSA MOT test for the Mercedes-Benz Glb in the 2023–2025 data: 22,051 tests across 4 model years (2020–2023). A test still carries exactly one pass or fail verdict.
| Measure | This model |
|---|---|
| Tests analysed | 22,051 |
| Overall pass rate | 92.3% |
| Passed on first attempt | 91.8% |
| Average mileage at test | 31,810 mi |
| Model years covered | 2020–2023 (4 years) |
| Versus UK national average | +11.3 pts above |
Figures are computed from every recorded DVSA test for this model in the 2023–2025 data.
Most Common Mercedes-Benz Glb MOT Problems by Failure Category
Every MOT failure a tester records belongs to one inspection section of the DVSA manual. For the Mercedes-Benz Glb, the Visibility section leads the record — the breakdown below shows where the recorded failures cluster, then the exact strings behind the three biggest sections.
| Inspection section | Share of failures |
|---|---|
| Visibility | 40% |
| Tyres | 38% |
| Brakes | 12% |
| Lamps, reflectors and electrical equipment | 6% |
| Seat belts and supplementary restraint systems | 2% |
| Body, chassis, structure | 1% |
| Suspension | 0% |
| Road Wheels | 0% |
Shares are over the Mercedes-Benz Glb's recorded defect strings, merged across its year pages.
Visibility
Around 40% of the recorded Mercedes-Benz Glb failures fall in the Visibility section of the MOT inspection manual. Testers recorded "Windscreen damaged but not adversely affecting driver's view" (1.8%), "Wipers blade defective" (1.3%), "Wipers does not clear the windscreen effectively" (0.6%) among the Mercedes-Benz Glb's visibility faults.
Tyres
Around 38% of the recorded Mercedes-Benz Glb failures fall in the Tyres section of the MOT inspection manual. Testers recorded "Has a cut in excess of the requirements deep enough to reach the ply or cords" (2.2%), "Has ply or cords exposed" (0.7%), "Tread depth below requirements of 1.6mm" (0.7%) among the Mercedes-Benz Glb's tyres faults.
Brakes
Around 12% of the recorded Mercedes-Benz Glb failures fall in the Brakes section of the MOT inspection manual. Testers recorded "Brake pads less than 1.5 mm thick" (0.8%), "Brake pads worn down to wear indicator" (0.3%), "Flexible brake hoses slightly twisted" (0.0%) among the Mercedes-Benz Glb's brakes faults.
Top Recorded Mercedes-Benz Glb DVSA MOT Test Statistics & Defect Descriptions
The descriptions below are the exact DVSA failure strings testers recorded most often for the Mercedes-Benz Glb, each with how many of the model's 22,051 tests it was noted on.
- "Has a cut in excess of the requirements deep enough to reach the ply or cords" (Major) — noted on about 489 Mercedes-Benz Glb tests, 2.2% of the model's MOT record.
- "Windscreen damaged but not adversely affecting driver's view" (Minor) — noted on about 401 Mercedes-Benz Glb tests, 1.8% of the model's MOT record.
- "Wipers blade defective" (Minor) — noted on about 288 Mercedes-Benz Glb tests, 1.3% of the model's MOT record.
- "Brake pads less than 1.5 mm thick" (Major) — noted on about 178 Mercedes-Benz Glb tests, 0.8% of the model's MOT record.
- "Has ply or cords exposed" (Major) — noted on about 160 Mercedes-Benz Glb tests, 0.7% of the model's MOT record.
- "Tread depth below requirements of 1.6mm" (Major) — noted on about 150 Mercedes-Benz Glb tests, 0.7% of the model's MOT record.
What Glb fails on more than most
3 failure items are recorded at least 1.5 times the UK rate on this model.
| Failure item | This model | UK | × UK | |
|---|---|---|---|---|
| Child seat fitted, preventing full inspection | 4.8% | 2.1% | 2.3× | £20–£80 |
| Tyre cut too deep | 4.9% | 2.5% | 2.0× | £45–£95 |
| Nail in tyre | 2.7% | 1.8% | 1.5× | £45–£95 |
Rates are a share of this model's own tests (22,051 for the top row), so a big seller cannot outrank a rare one. The UK figure is the same item's share of every test in our data. Items Glb records at or below the UK rate are not listed — this is where it is unusual, not a full inventory. All failure items · parts and costs
Best and Worst Mercedes-Benz Glb Model Years by Pass Rate
The strongest Mercedes-Benz Glb model year on record is 2023 (96.9% across 257 tests), and the weakest is 2020 (91.3%). The gap between them is 5.6 points. Years with fewer than 50 recorded tests are excluded, so these are the years with enough MOT history to mean something.
Mercedes-Benz Glb reliability is improving in the DVSA data — the pass rate moves about 1.8 points a year across the most recent model years shown above.
| Year | Tests | Pass rate |
|---|---|---|
| 2023 Glb | 257 | 96.9% |
| 2022 Glb | 5,267 | 93.3% |
| 2021 Glb | 8,363 | 92.5% |
| 2020 Glb | 8,164 | 91.3% |
Newest model year first. Only years with at least 50 recorded tests are listed.
Pre-MOT Inspection Checklist for Mercedes-Benz Glb Owners
These checks follow this Mercedes-Benz Glb's own most-recorded failure strings, starting with what a tester is most likely to flag on a Mercedes-Benz Glb.
-
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 wipers and washers — “wipers blade defective”
Run the wipers with the screen wet: they should clear it in one sweep without smearing or juddering. Top the washer bottle up and check both jets hit the screen.
-
the brakes — “brake pads less than 1.5 mm thick”
Look through the spokes of each wheel at the pad — less than 3mm of friction material, or a lip on the disc edge, is the usual failure. Check the handbrake holds on a slope with a few clicks, not at the top of its travel.
Derived from the DVSA failure strings testers recorded for the Mercedes-Benz Glb. A check that finds nothing means the item is likely fine, not that the test is guaranteed.
Frequently Asked Questions: Mercedes-Benz Glb MOT & Reliability
What is the Mercedes-Benz Glb MOT pass rate?
92.3% of the 22,051 recorded Mercedes-Benz Glb MOT tests ended in a pass, +11.3 percentage points above the national average. 91.8% of those passed on the first attempt.
Which Mercedes-Benz Glb model years pass the MOT most often?
2023 is the strongest Mercedes-Benz Glb year on record at 96.9%, while 2020 is the weakest at 91.3%. The year-by-year table below lists every model year with at least 50 recorded tests.
What are the most common Mercedes-Benz Glb MOT failures?
The most recorded Mercedes-Benz Glb failures are "Has a cut in excess of the requirements deep enough to reach the ply or cords" and "Windscreen damaged but not adversely affecting driver's view" — together around 4% of tests, mostly in the Tyres section.