Should I check the MOT history before buying a 1998 Mercedes Benz 300?

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 1998 Mercedes Benz 300?

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 1998 Mercedes Benz 300?

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 1998 Mercedes Benz 300 vehicles have had dangerous defects recorded?

28% 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 1998 Mercedes Benz 300 reliable?

Based on MOT data from 111 vehicles, the 1998 Mercedes Benz 300 has a first-time MOT pass rate of 73.7%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 1998 Mercedes Benz 300?

The most frequently recorded MOT issues on the 1998 Mercedes Benz 300 are: Nearside Front Tyre worn close to the legal limit (52.7% of vehicles), Offside Rear Tyre worn close to the legal limit (52.2% of vehicles), Nearside Rear Tyre worn close to the legal limit (41.8% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 1998 Mercedes Benz 300?

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 300 (1998)

111 real MOT outcomes analysed • 73.7% first-time pass rate

1998 Mercedes Benz 300

CarHunch analysed 111 real MOT records for the 1998 Mercedes Benz 300. 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 Common Issues Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Compare Models

The 1998 Mercedes-Benz 300 diesel has a first-time MOT pass rate of 73.7%, which sits below the UK average of 80% and suggests moderate reliability concerns. More worryingly, nearly 28% of these vehicles have recorded dangerous defects at some point, which is significantly higher than typical and should be a genuine buyer concern.

At 128,282 miles median, these cars are high-mileage examples for their age, and they're averaging over 3 failures and 16 advisories per test—indicating multiple wear-related issues. Before buying one, get a pre-purchase inspection focusing on the cooling system, suspension, and emissions equipment, as these older diesels are prone to expensive failures once they start accumulating defects.

We have limited data for the 1998 Mercedes Benz 300 — treat the figures below as indicative rather than definitive.

⚠️ 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

73.7%

UK average ~80%

Below average

Dangerous (ever)

27.9%

At least once in MOT history

Check this vehicle

Avg failures / car

3.14

Over 10.8 tests on record

High

Typical mileage

128k

Middle half: 104k–166k

For context

These stats describe 111 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.

Buyer beware — pass it on

What tends to go wrong

Across 111 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 52.7%

Nearside Front Tyre worn close to the legal limit · Offside Rear Tyre worn close to the legal limit · Nearside Rear Tyre worn close to the legal limit · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Other issues 37.9%

Windscreen has damage to an area less than a 10mm circle within zone 'A' · Windscreen has damage to an area less than a 40mm circle outside zone 'A' · Oil leak · …

Brake wear 32.4%

Brake pipe slightly corroded · Nearside Rear Brake pipe slightly corroded · Offside Rear Brake pipe slightly corroded · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Suspension & steering 21.4%

Nearside Front wheel bearing has slight play · Offside Front wheel bearing has slight play

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Wipers & washers 21.4%

Windscreen washer provides insufficient washer liquid

Data covers a 3-year window centred on 1998.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 111 Mercedes Benz 300 cars.

Before you buy a 1998 Mercedes Benz 300

Based on MOT data from 111 vehicles — here's what to check.

📋 Check the full MOT history. 27.9% 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
Diesel (96%)	107	73.5%	3.16

Mileage Distribution

Most 1998 Mercedes Benz 300 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.

128,282

typical

104,394

low mileage

165,921

high mileage

Half of all 1998 Mercedes Benz 300 vehicles fall between 104,394 and 165,921 miles.

Is the mileage you're seeing normal?

✓ Under 104,394 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.

✓ 104,394–165,921 miles — normal for age. This is where most 1998 Mercedes Benz 300s sit.

⚠ Over 223,993 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

1998 Mercedes Benz 300 — Still on the Road

Numbers are thinning — 24% of 1998 Mercedes Benz 300s are still active.

Numbers are declining — 11 vehicles still getting MOTs in 2019 (24% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2019.

MOT History Averages

10.8

Avg MOT tests per vehicle

3.14

Avg failures per vehicle

16.5

Avg advisories per vehicle

Other model years — Mercedes Benz 300: All 300 years → Which year to buy? →

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Compare with another model

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Buyer beware — pass it on