2009 Mercedes-Benz SLK 3.5L Petrol · KS09 VYX
2009 Mercedes-Benz SLK (3.5L, petrol). First registered 29 Jul 2009. Recorded mileage 70,987 miles. MOT expired on 15 May 2025.
- Make & Model
- MERCEDES-BENZ SLK
- Year / Origin
- 2009 · Northampton
- Safety Recall
- Unknown
- MOT Status
- Expired on 15 May 2025
- Road Tax
- —
- Recorded Mileage
- 70,987 mi
- ULEZ Compliance
- ULEZ Compliant (Euro 4+)
- Fuel & Engine
- Petrol · 3.5L
- Reliability Guide
- Common Faults
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KS09 VYX Key Findings
- 3 MOT tests recorded
- Latest MOT passed on 16/04/2024
- 70,987 miles recorded at latest MOT
- No defects recorded at the latest MOT
Derived directly from the recorded DVSA and DVLA data shown on this page.
KS09 VYX MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
3 MOT tests are recorded for this 2009 Mercedes-Benz Slk (KS09 VYX) between May 2022 and April 2024.
The record contains 3 passes and 0 failures.
No failures or advisories appear anywhere in the recorded tests, so the documented MOT record is relatively clean.
KS09 VYX Mileage History
- 12/05/202262,814 mi
- 16/05/202366,530 mi+3,716 mi
- 16/04/202470,987 mi+4,457 mi
Average of roughly 4,233 miles per year across 3 recorded odometer readings.
Technical Specifications
Core Specifications
Identification & Status
Dimensions & Weights
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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: 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.
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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 2009 model year cars.
- 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.
- 7G-Tronic Automatic Transmission Conductor Plate FailureModerate
The 722.9 7G-Tronic 7-speed automatic gearbox fitted to six-cylinder R171 SLKs features an electro-hydraulic conductor plate (VGS unit) submerged in hot automatic transmission fluid. Over time, thermal cycling and metallic sediment cause the integrated turbine and output speed sensors (Y3/8n1 and Y3/8n2) to fail, triggering diagnostic codes P0717, P0718, or P0705. When the signal drops, the transmission defaults into emergency limp-home mode, locking the gearbox into 2nd gear or reverse until restarted. Independent specialists can rebuild the plate, saving the cost of a brand new SCN-coded valve body.
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