2012 Mercedes-Benz S-Class 3.0L Diesel · KN12 AFX
2012 Mercedes-Benz S-Class (3.0L, diesel). First registered 01 Mar 2012. Recorded mileage 100,127 miles. MOT expired on 07 Jan 2025.
- Make & Model
- MERCEDES-BENZ S-Class
- Year / Origin
- 2012 · Northampton
- Safety Recall
- Unknown
- MOT Status
- Expired on 07 Jan 2025
- Road Tax
- Untaxed (30 Apr 2024)
- Recorded Mileage
- 100,127 mi
- ULEZ Compliance
- Non-Compliant (Pre-Euro 6 Diesel)
- Fuel & Engine
- DIESEL · 3.0L
- Reliability Guide
- Common Faults
AI-generated interpretation of this vehicle’s MOT record — not an official statement and not a substitute for an independent inspection.
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.
KN12 AFX Key Findings
- 3 MOT tests recorded
- Latest MOT passed on 08/01/2024
- 100,127 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.
KN12 AFX MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
3 MOT tests are recorded for this 2012 Mercedes-Benz S-Class (KN12 AFX) between December 2021 and January 2024.
The record contains 3 passes and 0 failures.
The record shows no MOT failures, although 7 advisory notices note items to monitor.
Across all tests, the most frequently flagged areas are: Brakes (3 issues), Lighting (2 issues), Suspension (1 issue), Tyres (1 issue). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
In total 7 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.
KN12 AFX Mileage History
- 22/12/202186,250 mi
- 12/12/202294,255 mi+8,005 mi
- 08/01/2024100,127 mi+5,872 mi
Average of roughly 6,784 miles per year across 3 recorded odometer readings.
Technical Specifications
Core Specifications
Identification & Status
Dimensions & Weights
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MOT Roadworthiness: Average
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.
Verify lender finance agreements, insurance write-offs, police stolen registers, and mileage rollback.
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
Proceed with confidence if the service history is documented. This specific S-Class shows a consistent MOT record with no recorded defects across its last three tests.
While the MOT history for this black 2.9L diesel S-Class is clean, an MOT certificate is not a substitute for a full service history. You should request evidence of regular oil changes and transmission fluid services, which are critical for high-displacement diesel engines like this 2987cc unit.
Negotiate based on the upcoming MOT requirement and check for any recent work done to address the common model failures noted in aggregate data, such as headlamps or tyres. Ensure the electronic systems are fully functional, as these are complex in this era of S-Class.
Running a large-capacity 2987cc diesel S-Class involves significant costs. While diesel engines offer better fuel economy for motorway cruising, the tax band for a 2012 model of this size will be substantial, and insurance groups for the S-Class are typically high.
Maintenance costs can be higher than average due to the complexity of the vehicle's components. Expect higher-than-average costs for tyres and specialized parts. An estimated annual running cost is roughly £2,500-£3,500 depending on usage and insurance profile.
Focus your inspection on the items that frequently cause failures in this model according to aggregate data: headlamps, tyres, and engine management systems. Even though this specific vehicle has no recorded defects, these remain the primary risk areas for the S-Class model type.
Check the condition of the tyres and the operation of all exterior lighting. Given the mileage is just over 100,000, inspect the suspension components and any signs of fluid leaks around the engine bay, which are common as these vehicles age.
This 2012 Mercedes-Benz S-Class (KN12AFX) presents with 100,127 miles on the clock as of its last MOT in January 2024. The vehicle has maintained a clean MOT record since at least 2021, passing three consecutive tests without any recorded defects. Given the model's aggregate data shows an 86.5% pass rate, this particular example sits above the statistical norm for its class.
Aggregate data for this model shows an 86.5% MOT pass rate, with common failure points being headlamps, tyres, and engine management issues.
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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