1986 Mercedes-Benz 420 4.2L Petrol · D6 SLX
1986 Mercedes-Benz 420 (4.2L, petrol). First registered 01/08/1986. Recorded mileage 151,996 miles. MOT valid until 28/05/2027. Taxed until 01/05/2027.
- Make & Model
- MERCEDES-BENZ 420
- Year / Origin
- 1986 · Chester
- Safety Recall
- Unknown
- MOT Status
- Valid until 28/05/2027
- Road Tax
- Taxed (01/05/2027)
- Recorded Mileage
- 151,996 mi
- ULEZ Compliance
- Check Required (Pre-Euro 4 Petrol)
- Fuel & Engine
- Petrol · 4.2L
- Reliability Guide
- Common Faults
- Fuel Type
- Petrol
- Year
- 1986
- Engine
- 4196cc
D6 SLX Key Findings
- 28 MOT tests recorded
- Latest MOT passed on 30/05/2026
- 151,996 miles recorded at latest MOT
- 11 historical MOT failures
- 1 defect noted at the latest MOT
- Recurring lighting items (36 mentions)
Derived directly from the recorded DVSA and DVLA data shown on this page.
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.
Verify lender finance agreements, insurance write-offs, police stolen registers, and mileage rollback.
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D6 SLX Mileage History
- 13/04/2006122,947 mi
- 09/10/2007128,204 mi+5,257 mi
- 10/10/2007128,204 mi
- 29/12/2008130,231 mi+2,027 mi
- 30/12/2008130,232 mi+1 mi
- 04/08/2010131,972 mi+1,740 mi
- 06/08/2010131,972 mi
- 05/08/2011136,028 mi+4,056 mi
- 25/07/2012139,037 mi+3,009 mi
- 03/08/2012139,037 mi
- 09/09/2013141,508 mi+2,471 mi
- 10/09/2014143,335 mi+1,827 mi
- 25/09/2014143,370 mi+35 mi
- 09/09/2015145,849 mi+2,479 mi
- 21/09/2015149,918 mi+4,069 mi
- 23/09/2015145,954 mi-3,964 mi
- 23/09/2015145,954 mi
- 21/09/2016147,718 mi+1,764 mi
- 23/11/2016147,758 mi+40 mi
- 05/04/2018149,636 mi+1,878 mi
- 05/04/2018149,636 mi
- 05/06/2019150,955 mi+1,319 mi
- 17/08/2021151,744 mi+789 mi
- 04/10/2022151,962 mi+218 mi
- 26/04/2024151,974 mi+12 mi
- 03/05/2024151,975 mi+1 mi
- 28/04/2025151,994 mi+19 mi
- 30/05/2026151,996 mi+2 mi
Average of roughly 1,443 miles per year across 28 recorded odometer readings.
Recorded mileage decreased between one or more tests — a potential clocking indicator worth verifying before purchase.
D6 SLX MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
28 MOT tests are recorded for this 1986 Mercedes-Benz 420 (D6 SLX) between April 2006 and May 2026.
The record contains 17 passes and 11 failures.
The most recent test on 30 May 2026 was a pass, although the earlier record includes 11 failures that buyers may want to investigate.
Across all tests, the most frequently flagged areas are: Lighting (36 issues), Suspension (17 issues), Brakes (13 issues), Windscreen (9 issues), Steering (7 issues). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
In total 71 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.
Recorded failure items include: “Front Windscreen washer provides insufficient washer liquid (3.5 (a))”; “Nearside Front Headlamp not working on main beam (4.1.1 (a) (ii))”; “Offside Front Headlamp aim too low (4.1.2 (a))”.
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