2009 Mercedes-Benz SL 5.5L Petrol · HK09 AOS
2009 Mercedes-Benz SL (5.5L, petrol). First registered 31 Jul 2009. Recorded mileage 35,499 miles. MOT expired on 13 Dec 2023.
- Make & Model
- MERCEDES-BENZ SL
- Year / Origin
- 2009 · Portsmouth
- Safety Recall
- Unknown
- MOT Status
- Expired on 13 Dec 2023
- Road Tax
- —
- Recorded Mileage
- 35,499 mi
- ULEZ Compliance
- ULEZ Compliant (Euro 4+)
- Fuel & Engine
- Petrol · 5.5L
- 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.
HK09 AOS Key Findings
- 1 MOT test recorded
- Latest MOT passed on 14/12/2022
- 35,499 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.
HK09 AOS MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
1 MOT test are recorded for this 2009 Mercedes-Benz Sl (HK09 AOS) between December 2022 and December 2022.
The record contains 1 pass and 0 failures.
The record shows no MOT failures, although 0 advisory notices note items to monitor.
Technical Specifications
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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 SL Model Intelligence & Reliability
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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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