2004 Mercedes-Benz SLK 1.8L Petrol · LL04 YNZ
2004 Mercedes-Benz SLK (1.8L, petrol). First registered 21 Jul 2004. Recorded mileage 50,356 miles. MOT valid until 03 Oct 2027.
- Make & Model
- MERCEDES-BENZ SLK
- Year / Origin
- 2004 · Wimbledon (South London)
- Safety Recall
- Unknown
- MOT Status
- Valid until 03 Oct 2027
- Road Tax
- —
- Recorded Mileage
- 50,356 mi
- ULEZ Compliance
- Check Required (Pre-Euro 4 Petrol)
- Fuel & Engine
- Petrol · 1.8L
- 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.
LL04 YNZ Key Findings
- 25 MOT tests recorded
- Latest MOT passed on 14/09/2026
- 50,356 miles recorded at latest MOT
- 4 historical MOT failures
- 1 defect noted at the latest MOT
- Recurring tyres items (18 mentions)
Derived directly from the recorded DVSA and DVLA data shown on this page.
LL04 YNZ MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
25 MOT tests are recorded for this 2004 Mercedes-Benz Slk (LL04 YNZ) between June 2008 and September 2026.
The record contains 21 passes and 4 failures.
The most recent test on 14 September 2026 was a pass, although the earlier record includes 4 failures that buyers may want to investigate.
Across all tests, the most frequently flagged areas are: Tyres (18 issues), Brakes (10 issues), Suspension (6 issues), Lighting (5 issues), Exhaust & Emissions (2 issues). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
In total 34 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: “Offside Front Tyre tread depth below requirements of 1.6mm (5.2.3 (e))”; “Nearside Front Tyre tread depth below requirements of 1.6mm (5.2.3 (e))”; “Nearside Front Position lamp not working (4.2.1 (a) (ii))”.
LL04 YNZ Mileage History
- 23/06/200812,339 mi
- 26/06/200915,013 mi+2,674 mi
- 22/06/201018,379 mi+3,366 mi
- 21/06/201122,438 mi+4,059 mi
- 02/07/201225,412 mi+2,974 mi
- 18/06/201327,731 mi+2,319 mi
- 16/06/201429,993 mi+2,262 mi
- 16/06/201429,993 mi
- 16/06/201532,248 mi+2,255 mi
- 23/06/201633,564 mi+1,316 mi
- 23/06/201736,534 mi+2,970 mi
- 30/06/201838,481 mi+1,947 mi
- 21/06/201941,111 mi+2,630 mi
- 30/09/201941,651 mi+540 mi
- 30/09/201941,651 mi
- 07/09/202043,192 mi+1,541 mi
- 05/10/202145,451 mi+2,259 mi
- 05/10/202145,451 mi
- 26/09/202247,703 mi+2,252 mi
- 05/10/202247,703 mi
- 27/09/202348,448 mi+745 mi
- 04/10/202348,449 mi+1 mi
- 09/09/202448,555 mi+106 mi
- 19/09/202549,634 mi+1,079 mi
- 14/09/202650,356 mi+722 mi
Average of roughly 2,086 miles per year across 25 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: 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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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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