2018 Mercedes-Benz B-Class 2.1L Diesel · RJ18 KCN
2018 Mercedes-Benz B-Class (2.1L, diesel). First registered 31 Jul 2018. Recorded mileage 33,216 miles. MOT valid until 29 Jul 2027.
- Make & Model
- MERCEDES-BENZ B-CLASS
- Year / Origin
- 2018 · Reading
- Safety Recall
- Unknown
- MOT Status
- Valid until 29 Jul 2027
- Road Tax
- —
- Recorded Mileage
- 33,216 mi
- ULEZ Compliance
- ULEZ Compliant (Euro 6 Diesel)
- Fuel & Engine
- Diesel · 2.1L
- 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.
RJ18 KCN Key Findings
- 5 MOT tests recorded
- Latest MOT passed on 23/07/2026
- 33,216 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.
RJ18 KCN 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 B-Class (RJ18 KCN) between July 2023 and July 2026.
The record contains 4 passes and 1 failure.
The most recent test on 23 July 2026 was a pass, although the earlier record includes 1 failure that buyers may want to investigate.
Across all tests, the most frequently flagged areas are: Lighting (1 issue). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
Recorded failure items include: “Rear Registration plate lamp inoperative in the case of a single lamp or all lamps both (4.7.1 (b) (ii))”.
RJ18 KCN Mileage History
- 26/07/202317,904 mi
- 29/07/202421,128 mi+3,224 mi
- 22/07/202523,764 mi+2,636 mi
- 23/07/202633,216 mi+9,452 mi
- 23/07/202633,216 mi
Average of roughly 5,117 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 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: Good
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.
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Historical MOT pass rates and DVLA records for 2018 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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