Market Position:
The 2009 Mercedes-Benz SLK350 (R171) is positioned as a premium, compact two-seater sports convertible, offering a blend of performance, luxury, and advanced technology. It competes in a segment with vehicles like the Audi TT Roadster, BMW Z4, and Porsche Boxster.
Competitive Analysis:
The SLK350's key differentiators include its innovative vario-roof (retractable hardtop), refined interior, strong V6 engine performance, and the renowned Mercedes-Benz build quality and safety features. This manual provides the critical technical data needed to maintain these sophisticated systems.
Key Features:
Focus on the R171 platform's advanced engineering, including the sophisticated retractable hardtop, powerful M272 V6 engine, and robust chassis dynamics. The manual's value lies in its official, comprehensive coverage of these complex systems.
Coverage Areas:
Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, HVAC, Electrical System, Body, Interior, Diagnostics, Maintenance, Repair Procedures, Troubleshooting
Page Count:
Extensive (Software; digital format with searchability)
Manual Type:
Official Service & Repair Manual Software
Format:
Software (Digital Download/Online Access)
Searchability:
Fully searchable text for quick information retrieval.
Systems Covered:
Engine Mechanical, Engine Management, Fuel System, Ignition System, Cooling System, Lubrication System, Exhaust System, Automatic Transmission (7G-TRONIC PLUS), Differential, Driveshafts, Suspension (Front & Rear), Steering System, Power Steering, Braking System (ABS, ESP), Climate Control (HVAC), Body Control Modules (BCM), Lighting, Instrumentation, SRS Airbag System, Infotainment System, Power Accessories (Windows, Locks, Seats), Convertible Hardtop Mechanism, Diagnostic Trouble Codes (DTCs), Wiring Diagrams
Electrical Diagrams:
Detailed wiring diagrams for all major electrical systems, including engine control, body electronics, comfort features, and safety systems.
Procedures Included:
Routine Maintenance, Scheduled Servicing, Engine Overhaul, Transmission Service & Repair, Differential Service, Suspension Component Replacement, Brake Service & Repair, Steering System Repair, HVAC System Diagnosis & Repair, Electrical Component Testing & Replacement, Body Panel Repair & Replacement, Convertible Top Mechanism Repair, Diagnostic Procedures, Troubleshooting Guides, Wiring Harness Repair, Software Updates & Diagnostics
Diagnostic Trouble Codes:
Extensive list of DTCs with detailed explanations, possible causes, and diagnostic steps.
Technical Depth:
Comprehensive; covers from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and wiring schematics. Suitable for professional technicians and experienced DIY enthusiasts.
NHTSA Front Impact:
5-Star
NHTSA Side Impact:
4-Star (Front), 5-Star (Rear)
Active Features:
Anti-lock Braking System (ABS), Electronic Stability Program (ESP), Traction Control System (TCS), Brake Assist (BAS)
Passive Features:
Driver and Passenger Front Airbags, Side Airbags, Knee Airbags, Roll-Over Protection System (Pop-up Roll Bars), Pre-tensioning Seatbelts, Crumple Zones
Infotainment System:
COMAND APS (Cockpit Management and Navigation EXperience) with 6.5-inch color display, optional Harman Kardon Logic 7 surround sound system.
Driver Assistance Features:
Standard features include cruise control. Optional features may include front and rear parking sensors (PARKTRONIC).
Connectivity Options:
Optional Bluetooth connectivity for hands-free calling and audio streaming (via COMAND system).
Convenience Features:
Keyless-Go ignition, bi-xenon headlamps with cornering function, automatic climate control, heated seats, memory seats.
Major Service Interval:
Assyst Plus system indicates service intervals based on driving conditions, typically around 10,000-15,000 miles or annually. Key items include oil changes, filter replacements, and comprehensive inspections.
Engine Oil:
Mobil 1 Synthetic 0W-40 (Meets MB 229.5 Specification)
Coolant:
Mercedes-Benz Antifreeze/Coolant (MB 325.0 or 325.5 Specification)
Brake Fluid:
DOT 4 Plus (Meets MB 331.0 Specification)
Transmission Fluid:
MB 236.14 Specification (e.g., Shell ATF 134)
Power Steering Fluid:
Pentosin CHF 11S (Meets MB 343.0 Specification)
Automatic Transmission Fluid Capacity:
Approximately 8.0 - 8.5 Liters (17.6 - 18.7 Pints) for a complete fluid change.
Engine Oil Capacity:
Approximately 6.5 Liters (6.9 Quarts)
Known Issues:
M272 engine balance shaft wear (especially in earlier models, less prevalent in later 2009 models), oil cooler seal leaks, potential issues with the retractable hardtop mechanism (e.g., pump, cylinders, sensors), vapor canister purge valve failures, early SBC brake system issues (not applicable to 2009 SLK350).
Oil Filter Part Number:
A2721800009 (Example)
Air Filter Part Number:
A2720900201 (Example)
Cabin Filter Part Number:
A1718350047 (Example)
Brand Heritage:
Mercedes-Benz has a long-standing reputation for luxury, engineering excellence, and pioneering automotive safety and technology since its inception.
Model Evolution:
The R171 SLK generation, introduced in 2004, was a significant evolution from its R170 predecessor, featuring a more aggressive design, the signature retractable vario-roof, and improved performance and technology. The 2009 model year represents a mid-cycle refresh with updated styling and features.
Production Location:
Bremen, Germany
Production Years For R171:
2004-2010
