🏷️ Basic Information Identification Make: Mercedes-Benz Model: SLK320 Year: 2004 Chassis Code: R171 👋 Introduction Market Position Vehicle Segment: Compact Sports Car / Roadster Target Audience: Enthusiasts seeking a premium, stylish, and sporty convertible experience. Competitive Analysis Key Competitors: BMW Z4, Audi TT Roadster, Porsche Boxster, Chevrolet Corvette (lower trims) Key Features Convertible System: Vario-Roof retractable hardtop, offering coupe-like security and convertible freedom. Design Philosophy: Aggressive styling, driver-focused cockpit, premium materials, and advanced technology for its class. 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Additional Coverage: Maintenance, Diagnostics, Troubleshooting, Wiring Diagrams, Specifications Target User: Professional Technicians and Enthusiast DIYers Page Count Estimated Pages: 1500+ Manual Type Type: Factory Service Manual (FSM) / Workshop Manual License Status: Officially Licensed Language Language: English Format Format: Software (likely PDF or proprietary application) 📖 Manual Coverage Systems Covered Powertrain: Engine (M112 V6), Transmission (5G-TRONIC Automatic), Differential Chassis: Suspension (Front: McPherson Strut, Rear: Multi-link), Steering, Brakes (Front: Ventilated Discs, Rear: Solid Discs), Wheels and Tires Electrical: Engine Control Unit (ECU), Body Control Module (BCM), Lighting, Instrumentation, Audio System, Climate Control, Power Accessories, SRS (Airbag) System, CAN Bus Communication Body And Trim: Exterior Body Panels, Interior Trim, Convertible Top System (Vario-Roof), Doors, Windows, Seats Procedures Included Routine Maintenance: Oil and Filter Change, Air Filter Replacement, Spark Plug Replacement, Fluid Level Checks and Top-offs, Brake Pad/Rotor Replacement, Tire Rotation Engine Repair: Timing Belt/Chain Inspection (though M112 is chain-driven), Cylinder Head Overhaul, Piston/Ring Replacement, Seal Replacement, Cooling System Service Transmission Repair: Fluid and Filter Service, Valve Body Diagnostics, Seal Replacements, Torque Converter Service Suspension And Steering: Shock/Strut Replacement, Control Arm Bushing Replacement, Tie Rod End Replacement, Power Steering System Service Brake System: Brake Fluid Flush, Caliper Rebuild, ABS/ESP System Diagnostics and Repair Electrical Diagnostics: Wiring Diagram Interpretation, Component Testing, Sensor Diagnosis, ECU Reprogramming/Adaptation (where applicable) Convertible Top: Hydraulic System Service, Actuator Replacement, Sensor Calibration, Weatherstripping Maintenance Diagnostic Codes: P-codes and manufacturer-specific OBD-II codes with descriptions and troubleshooting steps. Technical Depth Diagnostic Capabilities: Advanced fault code reading and interpretation, live data streaming (requires compatible diagnostic tool), component activation tests Rebuild Procedures: Detailed specifications and procedures for major component overhauls (engine, transmission) Troubleshooting Guides: Systematic diagnostic flowcharts for common and uncommon issues Wiring Diagrams: Comprehensive, system-by-system wiring diagrams included, crucial for electrical troubleshooting. 📊 Manual Specifications File Format Digital Format: Proprietary Software / Searchable PDF Print Quality Digital Quality: High-resolution diagrams and text, printable pages Binding Type Digital Format Notes: Digital delivery allows for instant access and search functionality. Paper Type Digital Medium: Delivered electronically via download. ⚙️ Engine Specifications Primary Engine Engine Code: M112 E32 ML Configuration: 3.2L SOHC 18-valve V6 (90-degree bank angle) Bore X Stroke: 89.9 mm x 84.0 mm Compression Ratio: 10.0:1 Performance Horsepower: 215 hp @ 5750 rpm Torque: 221 lb-ft @ 3000-4500 rpm Fuel System Induction: Naturally Aspirated Fuel Type: Premium Unleaded Gasoline (91+ Octane) Fuel Delivery: Electronic Fuel Injection (EFI) with Sequential Multi-Port Fuel Injection (MPFI) Engine Management ECU Type: Bosch Motronic ME 2.8 (or similar variant) 🔧 Transmission Standard Type: 5-speed Automatic (5G-TRONIC, 722.6) Manual Override: TouchShift (Driver selectable manual shifting) Optional Availability: Not available for SLK320 in 2004; a 6-speed manual was offered on other SLK models/years. Features Fluid Type: MB Spec 236.10 ATF (e.g., Mobil ATF 220, Pentosin ATF 1) Fluid Capacity: Approximately 7.5-8.0 liters (dry fill) 📐 Dimensions Exterior Length: 157.2 in (3993 mm) Width: 69.5 in (1765 mm) Height: 50.7 in (1288 mm) Wheelbase: 81.5 in (2070 mm) Front Track: 59.3 in (1506 mm) Rear Track: 58.7 in (1491 mm) Weights Curb Weight: 3285 lbs (1490 kg) Gross Vehicle Weight Rating: 3968 lbs (1800 kg) Cargo Trunk Volume Top Up: 8.5 cu ft (240 L) Trunk Volume Top Down: 4.2 cu ft (119 L) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (for driver and passenger, typical for the era) IIHS Side Impact: Good (typical for Mercedes-Benz of this period) Active Features ABS: Standard Anti-lock Braking System Esp: Standard Electronic Stability Program (ESP) Traction Control: Standard ASR (Acceleration Slip Regulation) Passive Features Airbags: Driver, Passenger, Side-Impact (Thorax) Airbags Rollover Protection: Pop-up roll bars integrated behind the headrests Seatbelts: Pretensioning Seatbelts with Force Limiters 💡 Technology Features Infotainment Head Unit: COMAND APS (optional) or Audio 20 with CD player Navigation: Available with COMAND APS navigation system Audio Features: Optional Bose sound system, optional CD changer Driver Assistance Cruise Control: Standard Cruise Control Parking Assist: Optional PARKTRONIC parking sensors Connectivity Bluetooth: Optional Bluetooth telephone module Comfort Features Climate Control: Standard THERMATIC automatic climate control (optional THERMOTRONIC dual-zone) Seats: Standard heated sport seats, optional multi-contour seats, optional power adjustment with memory 🔧 Maintenance Service Intervals Oil And Filter Change: Flexible Service System (ASSYST) - typically every 10,000 miles or 12 months, whichever comes first, or as indicated by the onboard computer. Spark Plug Replacement: Approximately 100,000 miles (original...