Should I check the MOT history before buying a 2020 Mercedes Benz Amg A 45 S 4matic+ Plus 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 Amg A 45 S 4matic+ Plus 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 Amg A 45 S 4matic+ Plus 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 Amg A 45 S 4matic+ Plus Auto reliable?

Based on MOT data from 380 vehicles, the 2020 Mercedes Benz Amg A 45 S 4matic+ Plus Auto has a first-time MOT pass rate of 90.5%, 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 Amg A 45 S 4matic+ Plus 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 Amg A 45 S 4matic+ Plus Auto (2020)

380 real MOT outcomes analysed • 90.5% first-time pass rate

2020 Mercedes Benz Amg A 45 S 4matic+ Plus Auto

CarHunch analysed 380 real MOT records for the 2020 Mercedes Benz Amg A 45 S 4matic+ Plus 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

Moderate sample. 380 vehicles on record. Figures are indicative — the specific vehicle's history matters more than these averages.

This Mercedes-AMG A 45 S is performing right at the UK average with a 79.5% first-time MOT pass rate, though the 18.9% of vehicles that have recorded a dangerous defect is worth noting—nearly one in five cars—suggesting you should factor in thorough pre-purchase inspections. At 27,103 miles average for a 2020 model, these cars are running fairly low mileage, which is typical for a high-performance hatchback of this calibre.

The 0.36 average failures and 1.4 advisories per vehicle indicate this is a relatively robust performer once it gets past initial MOT hurdles, but the modest median Carhunch score of 50 reflects those safety concerns flagged during testing. Before committing to one, insist on a full pre-purchase inspection focusing on braking systems and suspension components, as these are the likely sources of the dangerous defect flag.

The 2020 Mercedes Benz Amg A 45 S 4matic+ Plus Auto passes its MOT first time at roughly the UK average rate (90.5%) — solid but worth checking this vehicle's history carefully.

⚠️ Around 1 in 8 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

90.5%

UK average ~80%

Better than average

Dangerous (ever)

19%

At least once in MOT history

Check this vehicle

Avg failures / car

0.36

Over 3.1 tests on record

Low

Typical mileage

26k

Middle half: 19k–34k

For context

✅ Good baseline reliability. A 90.5% 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 380 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.

Average reliability — agree?

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 380 Mercedes Benz Amg A 45 S 4matic+ Plus Auto cars.

Before you buy a 2020 Mercedes Benz Amg A 45 S 4matic+ Plus Auto

Based on MOT data from 380 vehicles — here's what to check.

📋 Check the full MOT history. 19% 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 (98%)	373	90.6%	0.36

Colour Breakdown

Based on 2,009 Mercedes Benz Amg A 45 S 4matic+ Plus Auto vehicles registered in the UK — across all years. From DVLA registration records.

Grey 35.6%

715

Black 31.4%

631

White 15.6%

313

Blue 6%

121

Red 5.5%

111

Yellow 3.5%

Silver 2.4%

Mileage Distribution

Most 2020 Mercedes Benz Amg A 45 S 4matic+ Plus 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.

25,541

typical

18,508

low mileage

33,915

high mileage

Half of all 2020 Mercedes Benz Amg A 45 S 4matic+ Plus Auto vehicles fall between 18,508 and 33,915 miles.

Is the mileage you're seeing normal?

✓ Under 18,508 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.

✓ 18,508–33,915 miles — normal for age. This is where most 2020 Mercedes Benz Amg A 45 S 4matic+ Plus Autos sit.

⚠ Over 45,785 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 Amg A 45 S 4matic+ Plus Auto — Still on the Road

Almost all 2020 Mercedes Benz Amg A 45 S 4matic+ Plus Autos are still on the road.

Strong survival — 304 vehicles still getting MOTs in 2025, 97% 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

0.36

Avg failures per vehicle

1.4

Avg advisories per vehicle

Other model years — Mercedes Benz Amg A 45 S 4matic+ Plus Auto: All Amg A 45 S 4matic+ Plus Auto years → Which year to buy? →

2021 2022 2023 2024 2025

Or browse all models: Mercedes Benz →

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See how the 2020 Mercedes Benz Amg A 45 S 4matic+ Plus Auto stacks up against a rival.

Average reliability — agree?