2004 Mercedes-Benz SLK 2.3L Petrol · KV04 UHH
2004 Mercedes-Benz SLK (2.3L, petrol). First registered 09 Mar 2004. Recorded mileage 44,104 miles. MOT valid until 06 Jul 2027.
- Make & Model
- MERCEDES-BENZ SLK
- Year / Origin
- 2004 · Northampton
- Safety Recall
- Unknown
- MOT Status
- Valid until 06 Jul 2027
- Road Tax
- —
- Recorded Mileage
- 44,104 mi
- ULEZ Compliance
- Check Required (Pre-Euro 4 Petrol)
- Fuel & Engine
- Petrol · 2.3L
- 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.
KV04 UHH Key Findings
- 5 MOT tests recorded
- Latest MOT passed on 08/07/2026
- 44,104 miles recorded at latest MOT
- 1 historical MOT failure
- No defects recorded at the latest MOT
- Recurring exhaust & emissions items (3 mentions)
Derived directly from the recorded DVSA and DVLA data shown on this page.
KV04 UHH 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 2004 Mercedes-Benz Slk (KV04 UHH) between June 2023 and July 2026.
The record contains 4 passes and 1 failure.
The most recent test on 08 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: Exhaust & Emissions (3 issues). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
Recorded failure items include: “Exhaust carbon monoxide content at idle exceeds manufacturer's specified limits (8.2.1.2 (b))”; “Exhaust hydrocarbon content after 2nd fast idle exceeds manufacturer's specified limits (8.2.1.2 (a))”; “Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))”.
KV04 UHH Mileage History
- 23/06/202340,527 mi
- 23/06/202340,530 mi+3 mi
- 27/06/202441,881 mi+1,351 mi
- 20/06/202542,994 mi+1,113 mi
- 08/07/202644,104 mi+1,110 mi
Average of roughly 1,176 miles per year across 5 recorded odometer readings.
Technical Specifications
Core Specifications
Identification & Status
Dimensions & Weights
Diagnostic & Valuation Intelligence
Estimate current market value
Generate an instant valuation benchmark based on live market listings, vehicle mileage, and recent dealer auction figures.
Known faults for Mercedes-Benz Mercedes-Benz SLK (R171)
Our database tracks 6 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.
Verify lender finance agreements, insurance write-offs, police stolen registers, and mileage rollback.
Similar Vehicles
Plate Neighbors
Batch Registration Neighbors (KV04 Series)
Vehicles registered in the same regional DVLA batch as KV04UHH.
SMART (MCC)
FORTWO CABRIOLET
MERCEDES E500 AVANTGARDE AUTO
E 500
SMART
ROADSTER 80 AUTO(RHD)
SMART (MCC)
FORTWO
MERCEDES-BENZ
E
MERCEDES-BENZ
S-Class
MERCEDES
ML
SMART
ROADSTER 80 AUTO(RHD)
VOLKSWAGEN
GOLF
VOLKSWAGEN
GOLF
AUDI
A6
AUDI
TT
MERCEDES-BENZ SLK 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 2004 model year cars.
- M272 V6 Balance Shaft WearSerious
Early 3.0L and 3.5L V6 engines used soft metal gears on the balance shaft. The gears wear down, altering engine timing and requiring a massive engine-out repair.
- Vario-Roof Hydraulic LeaksModerate
The complex folding hardtop uses multiple hydraulic cylinders that can leak as the seals age.
- Rear Subframe Corrosion and PerforationSerious
The pressed-steel multi-link rear subframe on the R171 SLK is highly prone to severe internal corrosion, aggravated by decades of wet UK winter roads and road salt. Moisture and grime accumulate inside the hollow box sections, rusting the subframe from the inside out until structural perforation occurs around the suspension control arm mounting points. In severe cases, an arm mount shears off entirely, causing sudden dangerous rear-wheel steering and an immediate MOT failure. Mercedes-Benz UK has historically assessed replacements under goodwill on a case-by-case basis.
Regional DVLA Registration Directory
Vehicles and registration batches issued by regional DVLA offices across the UK.
Recently Checked UK Vehicles
Live vehicle history checks and MOT records recently queried by UK car buyers.