Should I check the MOT history before buying a 1999 Mercedes Benz S Class?

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 1999 Mercedes Benz S Class?

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 1999 Mercedes Benz S Class?

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.

How many 1999 Mercedes Benz S Class vehicles have had dangerous defects recorded?

21% of these vehicles have had a dangerous defect recorded. Search the registration on CarHunch — the full MOT history will show exactly what was flagged and whether it was resolved.

Is the 1999 Mercedes Benz S Class reliable?

Based on MOT data from 2,363 vehicles, the 1999 Mercedes Benz S Class has a first-time MOT pass rate of 77%, 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 1999 Mercedes Benz S Class?

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 S Class (1999)

2,363 real MOT outcomes analysed • 77% first-time pass rate

1999 Mercedes Benz S Class

CarHunch analysed 2,363 real MOT records for the 1999 Mercedes Benz S Class. 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 Compare Models

The 1999 Mercedes Benz S Class passes its MOT first time at roughly the UK average rate (77%) — solid but worth checking this vehicle's history carefully.

⚠️ Over 1 in 5 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

77%

UK average ~80%

Around average

Dangerous (ever)

21.4%

At least once in MOT history

Check this vehicle

Avg failures / car

2.89

Over 11.5 tests on record

High

Typical mileage

99k

Middle half: 77k–125k

For context

🔧 Average reliability. Passes at roughly the UK rate — not a standout, not a problem vehicle. Individual history makes all the difference.

🔧 Expect consumable spend. An average of 14.2 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 2,363 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 2,363 Mercedes Benz S Class cars.

Before you buy a 1999 Mercedes Benz S Class

Based on MOT data from 2,363 vehicles — here's what to check.

📋 Check the full MOT history. 21.4% 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 (98%)	2,326	77%	2.88

Mileage Distribution

Most 1999 Mercedes Benz S Class 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.

99,269

typical

77,491

low mileage

124,542

high mileage

Half of all 1999 Mercedes Benz S Class vehicles fall between 77,491 and 124,542 miles.

Is the mileage you're seeing normal?

✓ Under 77,491 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.

✓ 77,491–124,542 miles — normal for age. This is where most 1999 Mercedes Benz S Classs sit.

⚠ Over 168,131 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

1999 Mercedes Benz S Class — Still on the Road

Numbers are thinning — 13% of 1999 Mercedes Benz S Classs are still active.

Numbers are declining — 130 vehicles still getting MOTs in 2025 (13% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

11.5

Avg MOT tests per vehicle

2.89

Avg failures per vehicle

14.2

Avg advisories per vehicle

Other model years — Mercedes Benz S Class: All S Class years → Which year to buy? →

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Average reliability — agree?