Should I check the MOT history before buying a 2017 Mercedes Benz Gls?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2017 Mercedes Benz Gls?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2017 Mercedes Benz Gls?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

How many 2017 Mercedes Benz Gls vehicles have had dangerous defects recorded?

26% of these vehicles have had a dangerous defect recorded. Search the registration on CarHunch — the full MOT history will show exactly what was flagged and whether it was resolved.

Is the 2017 Mercedes Benz Gls reliable?

Based on MOT data from 786 vehicles, the 2017 Mercedes Benz Gls has a first-time MOT pass rate of 91.6%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2017 Mercedes Benz Gls?

The most frequently recorded MOT issues on the 2017 Mercedes Benz Gls are: Nearside Rear Tyre worn close to legal limit/worn on edge (32.2% of vehicles), Offside Rear Tyre worn close to legal limit/worn on edge (31.8% of vehicles), Offside Front Tyre worn close to legal limit/worn on edge (30.7% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 2017 Mercedes Benz Gls?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Mercedes Benz Gls (2017)

786 real MOT outcomes analysed • 91.6% first-time pass rate

2017 Mercedes Benz Gls

CarHunch analysed 786 real MOT records for the 2017 Mercedes Benz Gls. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

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AI Analysis Reliability Overview Common Issues Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 2017 Mercedes-Benz GLS is a strong performer in MOT testing, with a 91.6% first-time pass rate that beats the UK average of 80% by a clear margin. However, one in four of these vehicles (25.7%) have recorded a dangerous defect at some point, which is a material concern for a prospective buyer and warrants a thorough pre-purchase inspection.

At just under 49,000 miles on average, these cars are running relatively low mileage for their age, suggesting mostly urban or light use—and that low wear translates into fewer failures per vehicle (0.61 on average). Focus your inspection on the advisory items flagged during MOT (averaging 4.3 per car), as they hint at where maintenance costs may creep up; get a full history check and a pre-purchase diagnostic to verify any previous dangerous defects have been properly rectified.

The 2017 Mercedes Benz Gls has a decent first-time pass rate (91.6%), but a higher-than-average share of vehicles have had serious defects recorded — the individual vehicle's history matters a lot here.

⚠️ Over 1 in 5 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

91.6%

UK average ~80%

Better than average

Dangerous (ever)

25.7%

At least once in MOT history

Check this vehicle

Avg failures / car

0.61

Over 5.9 tests on record

Moderate

Typical mileage

48k

Middle half: 36k–61k

For context

✅ Good baseline reliability. A 91.6% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔧 Expect consumable spend. An average of 4.3 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 786 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

Watch for defects — worth knowing

What tends to go wrong

Across 786 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 32.2%

Nearside Rear Tyre worn close to legal limit/worn on edge · Offside Rear Tyre worn close to legal limit/worn on edge · Offside Front Tyre worn close to legal limit/worn on edge · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Brake wear 15.8%

Front Brake pad(s) wearing thin · Rear Brake pad(s) wearing thin · Front Brake disc worn, pitted or scored, but not seriously weakened · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Other issues 12.9%

COVID-19 6 MONTH EXTENSION · Nearside Rear Child Seat fitted not allowing full inspection of adult belt · Windscreen damaged but not adversely affecting driver's view · …

Data covers a 3-year window centred on 2017.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 786 Mercedes Benz Gls cars.

Before you buy a 2017 Mercedes Benz Gls

Based on MOT data from 786 vehicles — here's what to check.

📋 Check the full MOT history. 25.7% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Diesel (88%)	693	91.4%	0.63
Petrol (12%)	93	92.8%	0.49

Colour Breakdown

Based on 2,296 Mercedes Benz Gls vehicles registered in the UK — across all years. From DVLA registration records.

Black 47.4%

1,089

Grey 16.9%

389

White 12.8%

293

Blue 10.4%

238

Silver 10.2%

235

Red 1.9%

Brown 0.3%

Mileage Distribution

Most 2017 Mercedes Benz Gls vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

48,036

typical

36,157

low mileage

60,822

high mileage

Half of all 2017 Mercedes Benz Gls vehicles fall between 36,157 and 60,822 miles.

Is the mileage you're seeing normal?

✓ Under 36,157 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 36,157–60,822 miles — normal for age. This is where most 2017 Mercedes Benz Glss sit.

⚠ Over 82,109 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2017 Mercedes Benz Gls — Still on the Road

Most 2017 Mercedes Benz Glss are still being driven.

581 vehicles still getting MOTs in 2025 — 79% of the peak remain.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2020–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

5.9

Avg MOT tests per vehicle

0.61

Avg failures per vehicle

4.3

Avg advisories per vehicle

Other model years — Mercedes Benz Gls: All Gls years → Which year to buy? →

2016 2018 2019

Or browse all models: Mercedes Benz →

Compare with another model

See how the 2017 Mercedes Benz Gls stacks up against a rival.

Watch for defects — worth knowing