2012 Mercedes-Benz B-Class 1.8L Diesel · LH12 ARX
2012 Mercedes-Benz B-Class (1.8L, diesel). First registered 16 Mar 2012. Recorded mileage 121,478 miles. MOT expired on 12 Oct 2026.
- Make & Model
- MERCEDES-BENZ B-CLASS
- Year / Origin
- 2012 · Stanmore (North London)
- Safety Recall
- Unknown
- MOT Status
- Expired on 12 Oct 2026
- Road Tax
- —
- Recorded Mileage
- 121,478 mi
- ULEZ Compliance
- Non-Compliant (Pre-Euro 6 Diesel)
- Fuel & Engine
- Diesel · 1.8L
- 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.
LH12 ARX Key Findings
- 5 MOT tests recorded
- Latest MOT passed on 13/10/2025
- 121,478 miles recorded at latest MOT
- 1 historical MOT failure
- No defects recorded at the latest MOT
Derived directly from the recorded DVSA and DVLA data shown on this page.
LH12 ARX 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 2012 Mercedes-Benz B-Class (LH12 ARX) between October 2022 and October 2025.
The record contains 4 passes and 1 failure.
The most recent test on 13 October 2025 was a pass, although the earlier record includes 1 failure that buyers may want to investigate.
LH12 ARX Mileage History
- 12/10/202281,622 mi
- 12/10/202281,622 mi
- 11/10/202397,210 mi+15,588 mi
- 10/10/2024108,418 mi+11,208 mi
- 13/10/2025121,478 mi+13,060 mi
Average of roughly 13,271 miles per year across 5 recorded odometer readings.
Technical Specifications
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Dimensions & Weights
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Known faults for Mercedes-Benz Mercedes-Benz B-Class (W246)
Our database tracks 3 specific mechanical faults and recurring failure patterns identified across UK MOT testing stations for this generation.
MOT Roadworthiness: Below 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.
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Digital Service History
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MERCEDES-BENZ B-CLASS Model Intelligence & Reliability
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Owner-reported defects, recurring MOT failure points, and estimated repair costs.
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Historical MOT pass rates and DVLA records for 2012 model year cars.
- 7G-DCT Gearbox JudderModerate
The dual-clutch automatic can become hesitant or jerky if clutch wear is present or fluid changes have been skipped.
- OM651 Diesel Timing Chain Tensioner Oil LeakModerate
The gasket on the timing chain tensioner is a frequent leak point. Oil loss can reduce tensioner pressure and lead to chain rattle and eventual stretch.
- Water ingress in boot from rear air vent sealsModerate
The rear air vent seals behind the bumper can fail, allowing water into the boot. This can damage the rear SAM electrical module, causing lighting and locking faults.
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