Should I check the MOT history before buying a 2021 Mercedes Benz Glb 200 Amg Line 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 2021 Mercedes Benz Glb 200 Amg Line 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 2021 Mercedes Benz Glb 200 Amg Line 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 2021 Mercedes Benz Glb 200 Amg Line Auto reliable?

Based on MOT data from 1,409 vehicles, the 2021 Mercedes Benz Glb 200 Amg Line Auto has a first-time MOT pass rate of 93.7%, 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 200 Amg Line 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 Glb 200 Amg Line Auto (2021)

1,409 real MOT outcomes analysed • 93.7% first-time pass rate

2021 Mercedes Benz Glb 200 Amg Line Auto

CarHunch analysed 1,409 real MOT records for the 2021 Mercedes Benz Glb 200 Amg Line 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 MOT Averages Colour Breakdown Compare Models

This 2021 GLB 200 is more reliable than the average UK car, with an 86.6% first-time pass rate that beats the 80% national average—and only 5.4% have ever suffered a dangerous defect, which is reassuringly low. The petrol version (which accounts for virtually all sales) maintains that same strong 86.4% pass rate, so fuel type isn't a differentiator here.

At a median mileage of 30,417 miles for a three-year-old car, these are relatively lightly driven examples, which partly explains the low failure rate of just 0.19 per vehicle. Most issues are minor: advisories average 1.6 per car and typically cover wear items rather than structural problems, so expect routine maintenance costs rather than nasty surprises—but do get a full pre-purchase inspection to confirm any advisory items have actually been addressed by the seller.

The 2021 Mercedes Benz Glb 200 Amg Line Auto passes its MOT first time more often than most UK vehicles (93.7% 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

93.7%

UK average ~80%

Better than average

Dangerous (ever)

5.4%

At least once in MOT history

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Avg failures / car

0.19

Over 2.1 tests on record

Low

Typical mileage

30k

Middle half: 23k–40k

For context

✅ Good baseline reliability. A 93.7% 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 1.6 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 1,409 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 1,409 Mercedes Benz Glb 200 Amg Line Auto cars.

Before you buy a 2021 Mercedes Benz Glb 200 Amg Line Auto

Based on MOT data from 1,409 vehicles — here's what to check.

📋 Check the full MOT history. 5.4% 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
Petrol (99%)	1,391	93.6%	0.19

Colour Breakdown

Based on 3,310 Mercedes Benz Glb 200 Amg Line Auto vehicles registered in the UK — across all years. From DVLA registration records.

Grey 25.8%

854

White 24%

793

Black 22.1%

731

Red 13.5%

446

Blue 12.4%

409

Silver 2.3%

Mileage Distribution

Most 2021 Mercedes Benz Glb 200 Amg Line 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.

30,417

typical

23,412

low mileage

39,620

high mileage

Half of all 2021 Mercedes Benz Glb 200 Amg Line Auto vehicles fall between 23,412 and 39,620 miles.

Is the mileage you're seeing normal?

✓ Under 23,412 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.

✓ 23,412–39,620 miles — normal for age. This is where most 2021 Mercedes Benz Glb 200 Amg Line Autos sit.

⚠ Over 53,487 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

MOT History Averages

2.1

Avg MOT tests per vehicle

0.19

Avg failures per vehicle

1.6

Avg advisories per vehicle

Other model years — Mercedes Benz Glb 200 Amg Line Auto: All Glb 200 Amg Line Auto years → Which year to buy? →

2020 2022 2023

Or browse all models: Mercedes Benz →

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