2018 Mercedes-Benz S-Class 3.0L Petrol · A23 AAO
2018 Mercedes-Benz S-Class (3.0L, petrol). First registered 31 Oct 2018. Recorded mileage 66,389 miles. MOT valid until 25 Aug 2027. Taxed until 01 Mar 2027.
- Make & Model
- MERCEDES-BENZ S-Class
- Year / Origin
- 2018 · Peterborough
- Safety Recall
- Unknown
- MOT Status
- Valid until 25 Aug 2027
- Road Tax
- Taxed (01 Mar 2027)
- Recorded Mileage
- 66,389 mi
- ULEZ Compliance
- ULEZ Compliant (Euro 4+)
- Fuel & Engine
- Petrol · 3.0L
- Reliability Guide
- Common Faults
Thinking of buying this vehicle? Free MOT and tax checks do not cover legal ownership. If outstanding finance exists, finance companies have legal right to repossess without compensation.
A23 AAO Key Findings
- 5 MOT tests recorded
- Latest MOT passed on 27/08/2026
- 66,389 miles recorded at latest MOT
- No defects recorded at the latest MOT
- Recurring brakes items (3 mentions)
Derived directly from the recorded DVSA and DVLA data shown on this page.
A23 AAO MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
5 MOT tests are recorded for this 2018 Mercedes-Benz S-Class (A23 AAO) between November 2022 and August 2026.
The record contains 5 passes and 0 failures.
The record shows no MOT failures, although 4 advisory notices note items to monitor.
Across all tests, the most frequently flagged areas are: Brakes (3 issues), Tyres (1 issue). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
In total 4 advisory notices are recorded. Advisories flag items that passed but may need attention before the next test; they are not evidence of how well the vehicle has been serviced.
A23 AAO Mileage History
- 17/11/202239,850 mi
- 15/11/202346,176 mi+6,326 mi
- 12/11/202454,532 mi+8,356 mi
- 22/08/202562,226 mi+7,694 mi
- 27/08/202666,389 mi+4,163 mi
Average of roughly 7,029 miles per year across 5 recorded odometer readings.
Technical Specifications
Core Specifications
Identification & Status
Dimensions & Weights
Diagnostic & Valuation Intelligence
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Known faults for Mercedes-Benz Mercedes-Benz S-Class (W222)
Our database tracks 6 specific mechanical faults and recurring failure patterns identified across UK MOT testing stations for this generation.
MOT Roadworthiness: Excellent
This rating reflects historical MOT pass rates and recurring advisory wear patterns from official DVSA test logs. Note that roadworthiness does not verify outstanding finance, insurance write-offs, or stolen records.
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Digital Service History
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Buyer's Guide & Inspection Advisory
Expert automotive synthesis from historical MOT defect records and market benchmarks.
Our Verdict
A strong recommendation for buyers seeki
Focus on the service history to ensure the 3.0L petrol engine has been maintained according to manufacturer intervals. Specifically, check for invoices or records confirming that the front and rear brake discs and pads flagged as worn in November 2023 were replaced, as these are critical wear items for a vehicle of this weight.
Given the luxury specification of the S-Class, verify the operational status of all electronic systems and the air suspension. Negotiate based on the upcoming service requirements and the fact that the mileage is slightly higher than the average for this specific model group.
The 2999cc petrol engine will result in higher fuel consumption and a higher road tax bracket compared to smaller or diesel alternatives. Insurance for an S-Class typically falls into a higher group, reflecting the vehicle's high market value and the cost of specialized parts.
Maintenance costs for this model can be significant, particularly for brake replacements and electronic component repairs. Combined with fuel and tax, the annual expenditure will be substantially higher than a standard family car.
Inspect the braking system thoroughly; while the 2026 MOT was clean, the 2023 record specifically noted thin front pads and lipped/corroded discs. Check the tyres for even wear and tread depth, as a worn nearside rear tyre was flagged in 2022.
Additionally, pay close attention to the headlamps and dashboard warning lights, as these are identified as top MOT failure reasons across the wider S-Class population. Ensure all lighting elements are functioning correctly to avoid common model-specific failures.
This white 2018 Mercedes-Benz S-Class with a 2999cc petrol engine has recorded 66,389 miles as of August 2026. It has passed every MOT since 2022, with the most recent test recording no defects. The mileage is slightly above the model average of 7,246 miles per year, but remains reasonable for a luxury executive saloon of this age.
The S-Class maintains a respectable average MOT pass rate of 86.5%, with headlamps and tyres being the most frequent points of failure.
Reviewed by the IsItAGoodCar editorial team — Verified automotive analysis synthesized from official vehicle registries.
Data Sources
DVSA
Official MOT test logs & failure reasons
DVLA
Tax, registration & powertrain specs
Experian
Finance, stolen markers & total loss
AI Analysis
Historical fault & advisory patterns
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MERCEDES-BENZ S-Class Model Intelligence & Reliability
Verified MOT failure trends, buying advice, and technical directory specifications.
Owner-reported defects, recurring MOT failure points, and estimated repair costs.
Browse production generations, registration statistics, and trim variants.
Historical MOT pass rates and DVLA records for 2018 model year cars.
- Airmatic Suspension FailureSerious
The AIRMATIC semi-active air suspension system features rubber air spring bellows that perish and leak over time, valve blocks that seize, and an electric air compressor that burns out from running continuously to compensate for pressure loss. Replacing struts and compressors carries substantial parts costs.
- NOX Sensor FailureModerate
Diesel variants (OM642 3.0-litre V6 in S 350 d and OM656 2.9-litre straight-six in facelift models) suffer widespread failure of the upstream and downstream nitrogen oxide (NOx) exhaust sensors. Moisture ingress and thermal shock damage internal sensor ceramics, causing engine warnings and non-start countdowns.
- Front Suspension Ball Joint and Control Arm WearModerate
Weighing over two tonnes, the W222 exerts tremendous load on its complex multi-link front suspension. Lower control arm compliance bushes, track control ball joints, and anti-roll bar drop links wear rapidly on UK roads, resulting in knocking over speed bumps and MOT failure.
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