Should I check the MOT history before buying a 2018 Mercedes Benz Glc?

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 2018 Mercedes Benz Glc?

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 2018 Mercedes Benz Glc?

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.

Is the 2018 Mercedes Benz Glc reliable?

Based on MOT data from 19,930 vehicles, the 2018 Mercedes Benz Glc has a first-time MOT pass rate of 90.7%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2018 Mercedes Benz Glc?

The most frequently recorded MOT issues on the 2018 Mercedes Benz Glc are: Nearside Front Tyre worn close to legal limit/worn on edge (33.8% of vehicles), Offside Front Tyre worn close to legal limit/worn on edge (30% of vehicles), Nearside Rear Tyre worn close to legal limit/worn on edge (25.1% 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 2018 Mercedes Benz Glc?

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 Glc (2018)

19,930 real MOT outcomes analysed • 90.7% first-time pass rate

2018 Mercedes Benz Glc

CarHunch analysed 19,930 real MOT records for the 2018 Mercedes Benz Glc. 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 Petrol vs Diesel Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 2018 Mercedes-Benz GLC is genuinely reliable, with a 90.6% first-time pass rate that beats the UK average by over 10 percentage points. However, 18.5% of these cars have recorded a dangerous defect at some point, which is worth factoring into your inspection—petrol versions hold a slight edge over diesel at 92.0% versus 90.2% pass rates.

These GLCs average just 42,000 miles at test, suggesting well-maintained examples in the used market, though each vehicle typically racks up 0.6 failures and 4.3 advisories per MOT, pointing to wear on suspension and trim items rather than fundamental mechanical problems. Before buying, ask the seller for the full MOT history and have a pre-purchase inspection focus on the suspension and any previous dangerous defect recordings.

The 2018 Mercedes Benz Glc passes its MOT first time at roughly the UK average rate (90.7%) — solid but worth checking this vehicle's history carefully.

⚠️ Around 1 in 8 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

90.7%

UK average ~80%

Better than average

Dangerous (ever)

18.5%

At least once in MOT history

Check this vehicle

Avg failures / car

0.6

Over 5.5 tests on record

Moderate

Typical mileage

42k

Middle half: 33k–53k

For context

✅ Good baseline reliability. A 90.7% 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 19,930 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.

Average reliability — agree?

What tends to go wrong

Across 19,930 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 33.8%

Nearside Front Tyre worn close to legal limit/worn on edge · Offside Front Tyre worn close to legal limit/worn on edge · Nearside Rear 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 21.5%

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 13.3%

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

Suspension & steering 8.9%

Nearside Front Lower Suspension arm ball joint has slight play · Offside Front Lower Suspension arm ball joint has slight play

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Data covers a 3-year window centred on 2018.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 19,930 Mercedes Benz Glc cars.

Petrol vs Diesel

Pass rate difference of 1.7 percentage points — worth knowing if you're choosing between the two.

92%

Petrol

4,830 vehicles

90.3%

Diesel

15,100 vehicles

Before you buy a 2018 Mercedes Benz Glc

Based on MOT data from 19,930 vehicles — here's what to check.

📋 Check the full MOT history. 18.5% 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 (76%)	15,100	90.3%	0.64
Petrol (24%)	4,830	92%	0.5

Colour Breakdown

Based on 70,652 Mercedes Benz Glc vehicles registered in the UK — across all years. From DVLA registration records.

Black 32%

22,592

Grey 23.2%

16,379

White 18.4%

12,966

Blue 14.4%

10,145

Silver 9.2%

6,498

Red 2.7%

1,915

Brown 0.2%

145

Multi-colour 0%

Green 0%

Mileage Distribution

Most 2018 Mercedes Benz Glc 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.

42,091

typical

32,793

low mileage

53,125

high mileage

Half of all 2018 Mercedes Benz Glc vehicles fall between 32,793 and 53,125 miles.

Is the mileage you're seeing normal?

✓ Under 32,793 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.

✓ 32,793–53,125 miles — normal for age. This is where most 2018 Mercedes Benz Glcs sit.

⚠ Over 71,718 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2018 Mercedes Benz Glc — Still on the Road

Almost all 2018 Mercedes Benz Glcs are still on the road.

Strong survival — 18,050 vehicles still getting MOTs in 2025, 94% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2021–2025.

MOT History Averages

5.5

Avg MOT tests per vehicle

0.6

Avg failures per vehicle

4.3

Avg advisories per vehicle

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

2015 2016 2017 2019 2020 2021 2022

Or browse all models: Mercedes Benz →

Compare with another model

See how the 2018 Mercedes Benz Glc stacks up against a rival.

Average reliability — agree?