Mercedes Benz Gl car check
Find out if a Mercedes Benz Gl has outstanding finance, has been written off or stolen, how many owners it’s had, and which known problems apply to the generation you’re looking at.
Finance, stolen, write-off and owner history data provided by Experian. Results in under a minute.
- MOT failure rate
- 16.9%13k tests
- Known problems
- 5across X164 to X166
- Full report
- £7.49one-off, no subscription
Which Gl are you looking at?
Each Gl generation has its own weak spots. Pick the one you’re viewing to see what to check.
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Brake pipe corrosion
Safety risk X164Steel brake lines on the X164 GL generation corrode extensively due to road salt exposure and the vehicle's ground clearance exposing lines to spray. The 4.0L diesel variants show particularly high failure rates at MOT testing, with corrosion severe enough to compromise braking safety. This affects the high-pressure steel lines running along the chassis, not the flexible rubber sections at the wheels. Later X166 models use improved corrosion protection.
What to check: Inspect the steel brake lines running along both sides of the chassis from engine bay to rear axle. Look for orange rust staining, flaky metal, or thin sections where the original line diameter appears reduced. Check for crusty white or green deposits around brake line unions and connections - th...
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CV joint boot deterioration
Wear item X164, X166The constant velocity joint boots on GL models deteriorate at a higher rate than the fleet average, particularly on 3.0L diesel variants. These rubber boots protect the CV joints from dirt and moisture while containing lubricating grease. The heavy weight of GL vehicles and large wheel travel in off-road use accelerates boot wear. Boot failure allows grease to escape and contaminants to enter, eventually destroying the expensive CV joint itself.
What to check: Inspect the rubber boots on both ends of each front driveshaft - you'll see them where the driveshafts connect to the wheels and where they connect to the gearbox. Look for splits, cracks, or grease leakage around the boot edges. Check for grease splattered on the inside of the wheel rim or suspe...
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Engine management light - diesel emissions system
Engine damage risk X164, X166This typically relates to the complex diesel emissions system including EGR valve carbon build-up, DPF regeneration issues, or AdBlue system faults on later models. The heavy weight and frequent urban use of these vehicles exacerbates diesel emissions problems.
What to check: Check whether the engine management light (yellow engine symbol) is illuminated on the dashboard. Note if it's steady or flashing - flashing indicates a more serious fault. Ask the seller for recent diagnostic scan results or service history showing any emissions-related work. Check the AdBlue fl...
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Rear shock absorber failure
Wear item X164The 4.0L diesel X164 GL models show elevated rates of rear shock absorber failure, typically manifesting as oil leakage or complete loss of damping function. The heavy weight of these vehicles and the complexity of the air suspension system on higher trim levels contributes to premature shock wear. Standard steel spring models use conventional dampers while air suspension variants have more complex units integrated with air springs.
What to check: Walk around the vehicle and look for any obvious sagging at one corner - this indicates suspension failure. Check the rear shock absorber units for oil staining or wet patches around the damper body, which indicates seal failure. Press down firmly on each rear corner of the vehicle and release - ...
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Brake pedal rubber deterioration
Safety and MOT risk X164, X166GL models show an unusually high rate of brake pedal anti-slip rubber pad deterioration, affecting primarily the 3.0L diesel variants in higher mileage ranges. The rubber pad that provides grip for the driver's foot wears smooth or comes loose, creating a potential safety issue where the foot might slip off the brake pedal. This is a simple but important safety component that must be replaced when worn.
What to check: Examine the brake pedal rubber pad for wear patterns, smoothness, or any sections that are loose or missing. The surface should provide adequate grip texture. Press on the rubber pad to check it's securely attached to the metal pedal - it should not move or feel loose. Check if the rubber has wor...
We haven’t flagged any common problems for this generation in our data yet. A history check still tells you about finance, write-offs and theft, and the MOT history shows how this particular car has been looked after.
Gl MOT results
of Gl MOT tests end in a fail, from 12,715 tests.
Most common reasons for failing
- Headlight faultLights & Electrics
- Cable damaged or knottedBrakes
- Subframe bushes or mounts wornSuspension
Check the Gl you’re buying
One report covers outstanding finance, write-offs, theft and previous owners from Experian, plus MOT history, mileage and the known problems for its generation.
Finance, stolen, write-off and owner history data provided by Experian.
What the check includes
- Outstanding finance Experian
- Write-off status Experian
- Stolen vehicle check Experian
- Previous owners and keeper history Experian
- MOT history and advisories DVSA
- Mileage check DVSA
- Known problems for its generation GetCarWise
- How many are left on the road DVLA
Gl questions
Is the Mercedes Benz Gl reliable?
16.9% of Gl models fail their MOT based on 12,715 tests analysed. That’s about average for the class. There are 5 known problems to watch for, the most serious being brake pipe corrosion. A full history check shows whether a specific car has had related write-offs or insurance claims.
What are the main problems with a Mercedes Benz Gl?
The most serious known issues are brake pipe corrosion, cv joint boot deterioration, engine management light - diesel emissions system. Problems vary by generation, so check which apply to the year you’re looking at. Our car check flags whether a specific Gl has been written off or had insurance claims linked to these faults.
How do I check if a Mercedes Benz Gl has outstanding finance?
Enter the registration on this page. We query Experian’s finance database and return any outstanding agreements within a minute. If finance is still owed, the finance company can legally repossess the car even after you’ve paid the seller. At £7.49 it’s the cheapest way to avoid a car that isn’t legally for sale.
How do I check if a Mercedes Benz Gl has been written off?
Our check queries Experian’s insurance write-off database for Cat A, B, S and N markers. A Cat S or N Gl has been structurally or non-structurally damaged and repaired. This doesn’t mean it’s unsafe, but it affects resale value and some insurers won’t cover it. The check costs £7.49.
Can I check a Mercedes Benz Gl for free?
You can check MOT history free on GOV.UK, which shows past test results and advisories. What it won’t show is outstanding finance, write-offs or theft markers, which are the things that actually cost you money after you’ve bought. Our full check adds all of that for £7.49, using Experian data.
Is a Mercedes Benz Gl HPI check worth it?
HPI is one brand of car check. Our check uses the same Experian data covering finance, stolen, write-off and keeper history, plus MOT analysis and known Gl faults that HPI doesn’t include. At £7.49 it’s typically less than half the price of an HPI check.
What does a Mercedes Benz Gl fail its MOT on?
The most common MOT failure on the Gl is headlight fault. 16.9% of Gl models fail overall, based on 12,715 tests. Checking a car’s full MOT history before buying shows you recurring problems the seller might not mention.
More on the Gl
Other Mercedes Benz car checks
Finance, stolen, write-off and owner history data provided by Experian. MOT data from DVSA. Known problems from GetCarWise analysis. Updated October 2026.