2012 Mercedes-Benz B-Class 1.8L Diesel · RM52 KSM
2012 Mercedes-Benz B-Class (1.8L, diesel). First registered 05 Jul 2012. Recorded mileage 70,307 miles. MOT expired on 19 Jun 2026.
- Make & Model
- MERCEDES-BENZ B-CLASS
- Year / Origin
- 2012 · Reading
- Safety Recall
- Unknown
- MOT Status
- Expired on 19 Jun 2026
- Road Tax
- —
- Recorded Mileage
- 70,307 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.
RM52 KSM Key Findings
- 5 MOT tests recorded
- Latest MOT passed on 12/06/2025
- 70,307 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.
RM52 KSM 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 (RM52 KSM) between June 2022 and June 2025.
The record contains 4 passes and 1 failure.
The most recent test on 12 June 2025 was a pass, although the earlier record includes 1 failure that buyers may want to investigate.
RM52 KSM Mileage History
- 14/06/202257,572 mi
- 14/06/202361,927 mi+4,355 mi
- 10/06/202466,468 mi+4,541 mi
- 12/06/202570,307 mi+3,839 mi
- 12/06/202570,307 mi
Average of roughly 4,251 miles per year across 5 recorded odometer readings.
Technical Specifications
Core Specifications
Identification & Status
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
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 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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