Vehicle summary
ULEZ status is estimated based on fuel type and registration year. It may not reflect the actual emission standard of this vehicle. Check with TfL for a definitive answer.
At a glance
This 2021 Mercedes-Benz S-Class Petrol 3982cc has had 3 MOT tests on record, passing every one. It has 52,480 miles on the clock, averaging 12,391 miles per year, above the UK average of 7,400.
MOT & Mileage History for KN21 SFF
Data from DVSA. Last updated August 2026. Check gov.uk for the latest.
MOT failures recorded
Average miles/year
Gaps in MOT history
Mileage Analysis
Above average| Latest reading | 52,480 miles |
| Reading date | |
| Miles last year | 13,154 |
| Average per year | 12,391 |
| Mileage consistency | Consistent |
Check KN21 SFF
- Write-off & insurance claims Experian
- Outstanding finance check Experian
- Stolen vehicle check Experian
- Ownership changes Experian
- Mileage discrepancy alerts
- Plate & colour change history
- Franchised dealer records
- Independent garage visits
- Service interval analysis
- Warranty work logged
Full MOT Test History 3 tests on record
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Vehicle Details
| Registration | KN21 SFF |
| Make | Mercedes-Benz |
| Model | S-Class |
| Colour | Grey |
| Fuel type | Petrol |
| Engine | 3982cc |
| Year | 2021 |
| First registered | |
| Area code | KN — Luton, Luton and Northampton |
| Age identifier | 21 — March 2021 to August 2021 |
More KN21 S plates
Browse all KN21 S registrations from Luton.
About KN21 SFF
What car is KN21 SFF?
KN21 SFF is a grey Mercedes-Benz S-Class, petrol (3982cc). First registered in Luton in 2021.
What is the mileage of KN21 SFF?
The last recorded mileage for KN21 SFF was 52,480 miles, recorded on 21 Mar 2026 during its most recent MOT test.
Has KN21 SFF passed its MOT?
KN21 SFF has had 3 MOT tests with an 100% pass rate (3 passes, 0 failures). It last passed on 21 Mar 2026.
Is KN21 SFF ULEZ compliant?
Based on its fuel type and registration year, KN21 SFF is likely ULEZ compliant. Petrol post-2005 (Euro 4). This is an estimate based on typical emission standards — confirm with TfL's ULEZ checker for a definitive answer.
How old is KN21 SFF?
KN21 SFF is approximately 5 years old. Age identifier 21 means registered between 1 March 2021 and 31 August 2021.