Should I check the MOT history before buying a 2020 Mercedes Benz Glc 300 Sport 4matic Auto?

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 2020 Mercedes Benz Glc 300 Sport 4matic Auto?

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 2020 Mercedes Benz Glc 300 Sport 4matic Auto?

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 2020 Mercedes Benz Glc 300 Sport 4matic Auto reliable?

Based on MOT data from 542 vehicles, the 2020 Mercedes Benz Glc 300 Sport 4matic Auto has a first-time MOT pass rate of 94.2%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 2020 Mercedes Benz Glc 300 Sport 4matic Auto?

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 300 Sport 4matic Auto (2020)

542 real MOT outcomes analysed • 94.2% first-time pass rate

2020 Mercedes Benz Glc 300 Sport 4matic Auto

CarHunch analysed 542 real MOT records for the 2020 Mercedes Benz Glc 300 Sport 4matic Auto. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

This GLC 300 is a reliable performer, with an 82.2% first-time pass rate that edges above the UK average of 80%, and only 5.9% of vehicles ever developing dangerous defects—well below concerning levels. The hybrid variant (which makes up 511 of the 542 cars analysed) performs marginally better at 82.9%, suggesting the electrified powertrain is holding up well.

At nearly 30,000 miles on average, these 2020 models show typical mileage for their age, and the low failure rate of 0.22 per vehicle indicates the mechanicals are sound. The 1.3 advisories per car suggest minor wear items crop up, so when shopping used, have a pre-purchase inspection focus on suspension, brakes, and fluid seals rather than expecting major engine problems.

The 2020 Mercedes Benz Glc 300 Sport 4matic Auto passes its MOT first time more often than most UK vehicles (94.2% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

⚠️ Around 1 in 20 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

94.2%

UK average ~80%

Better than average

Dangerous (ever)

5.9%

At least once in MOT history

Check this vehicle

Avg failures / car

0.22

Over 3.1 tests on record

Low

Typical mileage

28k

Middle half: 20k–36k

For context

✅ Good baseline reliability. A 94.2% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔍 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 542 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.

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See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 542 Mercedes Benz Glc 300 Sport 4matic Auto cars.

Before you buy a 2020 Mercedes Benz Glc 300 Sport 4matic Auto

Based on MOT data from 542 vehicles — here's what to check.

📋 Check the full MOT history. 5.9% 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
Hybrid Electric (Clean) (94%)	511	94.4%	0.22

Colour Breakdown

Based on 801 Mercedes Benz Glc 300 Sport 4matic Auto vehicles registered in the UK — across all years. From DVLA registration records.

Black 29.5%

236

Grey 27.1%

217

Blue 15.4%

123

Silver 14.1%

113

White 11.5%

Red 2.5%

Mileage Distribution

Most 2020 Mercedes Benz Glc 300 Sport 4matic Auto 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.

27,998

typical

19,986

low mileage

36,208

high mileage

Half of all 2020 Mercedes Benz Glc 300 Sport 4matic Auto vehicles fall between 19,986 and 36,208 miles.

Is the mileage you're seeing normal?

✓ Under 19,986 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.

✓ 19,986–36,208 miles — normal for age. This is where most 2020 Mercedes Benz Glc 300 Sport 4matic Autos sit.

⚠ Over 48,880 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2020 Mercedes Benz Glc 300 Sport 4matic Auto — Still on the Road

Almost all 2020 Mercedes Benz Glc 300 Sport 4matic Autos are still on the road.

Strong survival — 463 vehicles still getting MOTs in 2025, 99% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2023–2025.

MOT History Averages

3.1

Avg MOT tests per vehicle

0.22

Avg failures per vehicle

1.3

Avg advisories per vehicle

Other model years — Mercedes Benz Glc 300 Sport 4matic Auto: All Glc 300 Sport 4matic Auto years → Which year to buy? →

2019

Or browse all models: Mercedes Benz →

Compare with another model

See how the 2020 Mercedes Benz Glc 300 Sport 4matic Auto stacks up against a rival.

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