2004 Mercedes-Benz SL 3.7L Petrol · R222 ORY
2004 Mercedes-Benz SL (3.7L, petrol). First registered 12 Mar 2004. MOT valid until 21 May 2027.
- Make & Model
- MERCEDES-BENZ SL
- Year / Origin
- 2004 · Reading
- Safety Recall
- Unknown
- MOT Status
- Valid until 21 May 2027
- Road Tax
- —
- Recorded Mileage
- —
- ULEZ Compliance
- Check Required (Pre-Euro 4 Petrol)
- Fuel & Engine
- Petrol · 3.7L
- Reliability Guide
- Common Faults
AI-generated interpretation of this vehicle’s MOT record — not an official statement and not a substitute for an independent inspection.
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.
R222 ORY Key Findings
- No MOT test records found for this registration
- MOT valid until 21/05/2027
Derived directly from the recorded DVSA and DVLA data shown on this page.
MOT Status
No MOT history available
No MOT test records were found for this registration. DVSA’s digital archive only covers tests from 2005, so a vehicle that has not been tested since then may legitimately have no visible history.
Technical Specifications
Core Specifications
Identification & Status
Dimensions & Weights
Diagnostic & Valuation Intelligence
Estimate current market value
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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.
Verify lender finance agreements, insurance write-offs, police stolen registers, and mileage rollback.
Buyer's Guide & Inspection Advisory
Expert automotive synthesis from historical MOT defect records and market benchmarks.
Our Verdict
Proceed with extreme caution regarding this 2004 Mercedes-Benz SL. While the low mileage is attractive, the complete lack of MOT history since February 2020 suggests the vehicle has been off the road for over six years, which poses significant mechanical and electrical risks.
Before committing to a purchase, you must verify why this vehicle has not had an MOT for over six years. Long-term storage is often more damaging to a complex vehicle like the R230 SL than regular use; expect to find perished rubber seals, seized brake calipers, and potential fuel system degradation.
Ensure you have a professional inspection performed by a specialist familiar with Mercedes-Benz hydraulic systems. Negotiate the price heavily to account for the inevitable costs of a full service, fluid changes, and potential replacement of aged components that have sat idle since 2020.
As a 3.7L petrol engine, this SL sits in a high tax bracket and will be thirsty on fuel, likely returning low-to-mid 20s mpg in mixed driving. Insurance for a high-performance luxury convertible of this age can be expensive, though classic car insurance policies may offer a more affordable route if the car is used sparingly.
Maintenance costs are the primary concern for this specific vehicle. Beyond standard consumables, you must budget for the complexity of the SL's systems, including the ABC (Active Body Control) suspension, which is notoriously costly to repair if it has failed due to lack of use.
Your primary focus must be the condition of the hydraulic suspension and the retractable roof mechanism. Since the car has not been tested since 2020, check for any fluid leaks under the car and ensure the roof operates smoothly without hesitation or warning lights on the dashboard.
Inspect the condition of the tyres, as even with low mileage, rubber compounds degrade over six years. Check the underside for corrosion, as sitting in storage can sometimes trap moisture against the chassis, and verify that the engine starts cleanly without misfires or excessive smoke, which could indicate failing seals or stale fuel.
This 3.7L petrol Mercedes-Benz SL is an intriguing prospect due to its remarkably low recorded mileage of 37,774 miles. However, the absence of MOT records since early 2020 is a major red flag for any prospective buyer. The car's long-term storage status means that while the bodywork and interior may be preserved, the mechanical components likely require extensive recommissioning.
The R230 series SL is known for complex electronic and hydraulic systems that require consistent maintenance to remain reliable.
Reviewed by the IsItAGoodCar editorial team — Verified automotive analysis synthesized from official vehicle registries.
Data Sources
DVSA
Official MOT test logs & failure reasons
DVLA
Tax, registration & powertrain specs
Experian
Finance, stolen markers & total loss
AI Analysis
Historical fault & advisory patterns
MOT Status
No MOT history available
No MOT test records were found for this registration. DVSA’s digital archive only covers tests from 2005, so a vehicle that has not been tested since then may legitimately have no visible history.
Vehicle & Plate History
Previous plates for this vehicle
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MERCEDES-BENZ SL 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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