Should I check the MOT history before buying a 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A?

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 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A?

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 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A?

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 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A reliable?

Based on MOT data from 827 vehicles, the 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A has a first-time MOT pass rate of 93.2%, 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 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A?

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 Glb 220 Amg Line Prem D 4m A (2021)

827 real MOT outcomes analysed • 93.2% first-time pass rate

2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A

CarHunch analysed 827 real MOT records for the 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A. 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 Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

This 2021 GLB 220 AMG Line is a strong performer with a 91.2% first-time pass rate — significantly above the UK average of 80% — and a low dangerous defect rate of just 7.5%, so you're buying into a mechanically sound cohort. The diesel engine and four-wheel drive setup appear to be holding up well early in their lifespan.

At an average mileage of 34,322 miles, these vehicles are running typical for their age, and the low failure count (0.23 per vehicle) suggests major component issues remain rare. The 1.7 advisories per test indicate minor wear items are appearing, but the median CarHunch score of 50 reflects a balanced vehicle that will need planned maintenance rather than emergency repairs — budget for routine servicing and have any advisory items checked by an independent specialist before purchase.

The 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A passes its MOT first time more often than most UK vehicles (93.2% 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

93.2%

UK average ~80%

Better than average

Dangerous (ever)

7.5%

At least once in MOT history

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Avg failures / car

0.23

Over 2.4 tests on record

Low

Typical mileage

33k

Middle half: 26k–42k

For context

✅ Good baseline reliability. A 93.2% 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 1.7 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 827 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 827 Mercedes Benz Glb 220 Amg Line Prem D 4m A cars.

Before you buy a 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A

Based on MOT data from 827 vehicles — here's what to check.

📋 Check the full MOT history. 7.5% 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

Colour Breakdown

Based on 3,654 Mercedes Benz Glb 220 Amg Line Prem D 4m A vehicles registered in the UK — across all years. From DVLA registration records.

Black 31.5%

1,150

Grey 29.7%

1,086

White 25.1%

916

Blue 6.1%

222

Red 4.5%

165

Silver 3.1%

115

Mileage Distribution

Most 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A 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.

32,602

typical

25,681

low mileage

41,860

high mileage

Half of all 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A vehicles fall between 25,681 and 41,860 miles.

Is the mileage you're seeing normal?

✓ Under 25,681 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.

✓ 25,681–41,860 miles — normal for age. This is where most 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m As sit.

⚠ Over 56,511 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2021 Mercedes Benz Glb 220 Amg Line Prem D 4m A — Still on the Road

Almost all 2021 Mercedes Benz Glb 220 Amg Line Prem D 4m As are still on the road.

Strong survival — 787 vehicles still getting MOTs in 2025, 100% 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

2.4

Avg MOT tests per vehicle

0.23

Avg failures per vehicle

1.7

Avg advisories per vehicle

Other model years — Mercedes Benz Glb 220 Amg Line Prem D 4m A: All Glb 220 Amg Line Prem D 4m A years → Which year to buy? →

2020 2022 2023 2024 2025

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