Should I check the MOT history before buying a 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat 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 Gls 400 Amg Ln Prem + D 4mat 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 Gls 400 Amg Ln Prem + D 4mat 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 Gls 400 Amg Ln Prem + D 4mat A reliable?

Based on MOT data from 131 vehicles, the 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat A has a first-time MOT pass rate of 79.7%, 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 Gls 400 Amg Ln Prem + D 4mat 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 Gls 400 Amg Ln Prem + D 4mat A (2021)

131 real MOT outcomes analysed • 79.7% first-time pass rate

2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat A

CarHunch analysed 131 real MOT records for the 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat 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 MOT Averages Compare Models

This Mercedes sits bang on the UK average for first-time pass rates at 79.7%, meaning it's neither notably reliable nor problematic—about as predictable as the typical car on British roads. The 12.2% dangerous defect rate is reassuringly modest, so serious safety issues aren't a concern with this cohort.

At 33,580 miles median for a 2021 model, these cars are running lower than average for their age, which suggests they've been well looked after and explains why advisories average just 1.4 per vehicle rather than something more troubling. When failures do happen, they're rare (0.31 per vehicle on average), so if you're buying one, get a pre-purchase inspection focused on routine maintenance items rather than bracing for major structural faults.

We have limited data for the 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat A — treat the figures below as indicative rather than definitive.

⚠️ Around 1 in 8 of these cars 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

79.7%

UK average ~80%

Around average

Dangerous (ever)

12.2%

At least once in MOT history

Check this vehicle

Avg failures / car

0.31

Over 2.2 tests on record

Low

Typical mileage

34k

Middle half: 26k–48k

For context

These stats describe 131 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.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 131 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat A cars.

Before you buy a 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat A

Based on MOT data from 131 vehicles — here's what to check.

📋 Check the full MOT history. 12.2% 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 →

Mileage Distribution

Most 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat 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.

33,580

typical

25,929

low mileage

47,897

high mileage

Half of all 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat A vehicles fall between 25,929 and 47,897 miles.

Is the mileage you're seeing normal?

✓ Under 25,929 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.

✓ 25,929–47,897 miles — normal for age. This is where most 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat As sit.

⚠ Over 64,660 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

2.2

Avg MOT tests per vehicle

0.31

Avg failures per vehicle

1.4

Avg advisories per vehicle

Other model years — Mercedes Benz Gls 400 Amg Ln Prem + D 4mat A: All Gls 400 Amg Ln Prem + D 4mat A years → Which year to buy? →

2020

Or browse all models: Mercedes Benz →

Compare with another model

See how the 2021 Mercedes Benz Gls 400 Amg Ln Prem + D 4mat A stacks up against a rival.

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