Mercedes-Benz Gl 320
From 771 MOT tests. Average for its class.
Common MOT failure categories
Pass rate by registration year
What goes wrong?
The most common MOT failure reasons are a direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, a lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning and brake pipe damaged or excessively corroded. The top issue, a direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, caused 25 failures in 2024. Checking tread depth (1.6mm legal minimum, 3mm recommended) before your test can save an unnecessary fail. You can check prices at Black Circles if you need replacements. If you need repairs before retesting, sites like BookMyGarage let you compare local prices.
| a direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | 25 |
| a lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | 18 |
| brake pipe damaged or excessively corroded | 18 |
| tyre tread depth not in accordance with the requirements | 17 |
| a rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources | 15 |
| a flexible brake hose excessively damaged, deteriorated, chafed, twisted or stretched | 14 |
| stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | 12 |
| steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc | 11 |
| a shock absorber damaged to the extent that it does not function or showing signs of severe leakage | 11 |
| smoke opacity levels exceed the manufacturer's specified limit | 10 |
How serious are these failures?
Not all MOT failures are equal. Only 19.2% of Gl 320 failures are serious (safety or roadside), below the 44.4% average. When this car fails its MOT, it's more likely to be lights, wipers, or emissions than something dangerous. When it does fail, the average repair bill is around £71.
By registration year
| Year | Pass rate | Top failures |
|---|---|---|
| 2009 | 72.1% | a direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning |
| 2008 | 78.7% | reflector missing or reflecting white to the rear, a lamp with a multiple light source up to 1/2 not functioning |
| 2007 | 73.7% | brake pipe damaged or excessively corroded, steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc |
Typical mileage
Half of all Gl 320s tested had between 112,675 and 155,355 miles on the clock. A significant number are high-mileage vehicles.
At 126,148 median miles, the Gl 320 has 0.02 failures per 10,000 miles driven.
Other Mercedes-Benz models
Common questions
What is the Mercedes-Benz Gl 320 MOT pass rate?
The Mercedes-Benz Gl 320 has a 75.4% MOT pass rate based on 771 real MOT tests. This is around the national average.
What are common MOT failures on a Mercedes-Benz Gl 320?
The most common MOT failure on the Mercedes-Benz Gl 320 is a direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, which caused 25 failures. Other common issues include a lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning.
What is the typical mileage of a Mercedes-Benz Gl 320 at MOT?
The median mileage at MOT for a Mercedes-Benz Gl 320 is 126,148 miles. The middle 50% of vehicles tested have between 112,675 and 155,355 miles.
Buying a used Gl 320?
Start with the free tools. Look up the specific vehicle's MOT history on GOV.UK The mileage at each test will show if it's been wound back, and the advisory history tells you what's wearing. Cross-reference that against the typical failures above to see if anything looks unusual for this model.
The free data won't tell you about outstanding finance, theft markers, or write-off history. For that, you need a vehicle history check This is especially important on a private sale where you have fewer legal protections.
With a 75.4% pass rate and an average repair bill of £71 when things go wrong, budget accordingly.
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MOT data from DVSA anonymised test results, 2024 test year. Fleet data from DfT vehicle licensing statistics. Crown copyright, OGL v3.0. MOT pass rates are statistical summaries of test outcomes, not assessments of individual vehicle safety or condition. Always inspect a vehicle and check its full MOT history before purchasing. See terms of use.