2004 Mercedes-Benz SLK 2.3L Petrol · L12 DOX
2004 Mercedes-Benz SLK (2.3L, petrol). First registered 04 Mar 2004. Recorded mileage 91,507 miles. MOT expired on 01 Feb 2025.
- Make & Model
- MERCEDES-BENZ SLK
- Year / Origin
- 2004 · Stanmore (Wimbledon)
- Safety Recall
- Unknown
- MOT Status
- Expired on 01 Feb 2025
- Road Tax
- —
- Recorded Mileage
- 91,507 mi
- ULEZ Compliance
- Check Required (Pre-Euro 4 Petrol)
- Fuel & Engine
- Petrol · 2.3L
- Reliability Guide
- Common Faults
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L12 DOX Key Findings
- 2 MOT tests recorded
- Latest MOT failed on 22/01/2025
- 91,507 miles recorded at latest MOT
- 1 historical MOT failure
Derived directly from the recorded DVSA and DVLA data shown on this page.
L12 DOX MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
2 MOT tests are recorded for this 2004 Mercedes-Benz Slk (L12 DOX) between February 2024 and January 2025.
The record contains 1 pass and 1 failure.
The most recent test on 22 January 2025 was a fail; the vehicle has not passed its last recorded MOT.
L12 DOX Mileage History
- 02/02/202485,316 mi
- 22/01/202591,507 mi+6,191 mi
Average of roughly 6,374 miles per year across 2 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 SLK (R171)
Our database tracks 6 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.
Verify lender finance agreements, insurance write-offs, police stolen registers, and mileage rollback.
Vehicle & Plate History
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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.
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