Should I check the MOT history before buying a 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m 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 S500 L Amg Ln Prm+exc Mhev4m 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 S500 L Amg Ln Prm+exc Mhev4m 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.

Do I need an HPI check when buying a 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m 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 S500 L Amg Ln Prm+exc Mhev4m A (2021)

Q: Is the 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A reliable?

Based on MOT data from 208 vehicles, the 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A has a first-time MOT pass rate of 91.3%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

208 real MOT outcomes analysed • 91.3% first-time pass rate

2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A

CarHunch analysed 208 real MOT records for the 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m 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 Pass Rate by Fuel Mileage Distribution MOT Averages Colour Breakdown Compare Models

This S500 is a significant reliability concern: just 40% pass their MOT first time, half the UK average of 80%, and 7.7% have suffered dangerous defects. The hybrid powertrain hasn't solved the problem—the pass rate sits at 39.7% across the 207 hybrids in this dataset.

Despite relatively modest mileage for a three-year-old luxury car (median 31,700 miles), these vehicles are racking up failures and advisories at a troubling rate. Before committing to one, insist on a full pre-purchase inspection by a Mercedes specialist, as the first-time pass rate suggests systemic issues that routine ownership won't address.

We have limited data for the 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A — treat the figures below as indicative rather than definitive.

⚠️ 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

91.3%

UK average ~80%

Better than average

Dangerous (ever)

7.7%

At least once in MOT history

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Avg failures / car

0.12

Over 1.6 tests on record

Low

Typical mileage

32k

Middle half: 20k–41k

For context

These stats describe 208 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 208 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A cars.

Before you buy a 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A

Based on MOT data from 208 vehicles — here's what to check.

📋 Check the full MOT history. 7.7% 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) (100%)	207	91.3%	0.12

Colour Breakdown

Based on 584 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A vehicles registered in the UK — across all years. From DVLA registration records.

Black 63.2%

369

Grey 9.6%

White 8.6%

Silver 6.2%

Blue 6.2%

Green 3.8%

Red 2.6%

Mileage Distribution

Most 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m 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.

31,699

typical

19,799

low mileage

40,869

high mileage

Half of all 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A vehicles fall between 19,799 and 40,869 miles.

Is the mileage you're seeing normal?

✓ Under 19,799 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.

✓ 19,799–40,869 miles — normal for age. This is where most 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m As sit.

⚠ Over 55,173 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

1.6

Avg MOT tests per vehicle

0.12

Avg failures per vehicle

0.3

Avg advisories per vehicle

Other model years — Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A: All S500 L Amg Ln Prm+exc Mhev4m A years → Which year to buy? →

2022 2023

Or browse all models: Mercedes Benz →

Compare with another model

See how the 2021 Mercedes Benz S500 L Amg Ln Prm+exc Mhev4m A stacks up against a rival.

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