Covers user-facing operations, basic checks, and general maintenance information. Does not include in-depth repair procedures or diagnostic trouble codes typical of a service manual.
📊 Manual Specifications
File Format
File Type:
PDF
Compatibility:
Requires PDF reader (Acrobat Reader, Foxit, or comparable); compatible with any device capable of reading PDF files.
Print Quality
Quality:
Digital reproduction of factory original, maintaining original clarity and content.
Binding Type
Type:
N/A (Digital Download)
Paper Type
Type:
N/A (Digital Download)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Naturally Aspirated V6
Engine Code:
M112 E32
Displacement:
3.2 Liters (3199 cc)
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 (300 Nm) @ 3000-4500 rpm
Fuel System
Fuel Delivery:
Electronic Fuel Injection (Sequential)
Fuel Type:
Premium Unleaded Gasoline (91 Octane or higher recommended)
Engine Compartment
Engine Layout:
Front-mounted, Longitudinal
Valvetrain:
SOHC, 3 Valves per Cylinder (18 Valves Total)
Maintenance
Recommended Oil Type:
Mobil 1 Synthetic SAE 0W-40 (or equivalent)
Oil Filter Part Number:
Mercedes-Benz A1121800009 (or equivalent like MANN-FILTER W712/4, MAHLE OC219)
Engine Oil Capacity:
8.0 Liters (8.5 US Quarts)
Air Filter Part Number:
Mercedes-Benz A2030940204 (or equivalent like MANN-FILTER C30228)
Approximately 7.5 Liters (for dry fill, less for fluid change)
📐 Dimensions
Exterior
Length:
169.5 inches (4305 mm)
Width:
70.5 inches (1791 mm)
Height:
50.1 inches (1273 mm)
Wheelbase:
94.5 inches (2400 mm)
Front Track:
59.3 inches (1506 mm)
Rear Track:
58.7 inches (1491 mm)
Weights
Curb Weight:
3200-3300 lbs (approx. 1450-1500 kg)
Gross Vehicle Weight Rating:
4277 lbs (1940 kg)
Weight Distribution:
Near 50/50 front/rear
Cargo
Trunk Volume:
10.2 cu ft (288 Liters) with roof up; 6.5 cu ft (184 Liters) with roof down
🛡️ Safety Features
Ratings
NHTSA Front Impact:
5-Star (for driver and passenger)
IIHS Side Impact:
Good
Active Features
Braking System:
Four-wheel Anti-lock Braking System (ABS)
Stability Control:
Electronic Stability Program (ESP)
Traction Control:
ASR (Acceleration Slip Regulation)
Passive Features
Airbags:
• Frontal airbags (driver and passenger)
• Side airbags (integrated into seats)
Rollover Protection:
Automatic rollover protection system (pop-up bars behind headrests)
Seat Belts:
3-point inertia-reel seat belts with pre-tensioners and belt force limiters
💡 Technology Features
Infotainment
Audio System:
COMAND (Cockpit Management and Navigation) with optional navigation, CD player, and radio.
Display:
Central color display for audio, climate, and navigation information.
Connectivity
Optional Features:
• Tele Aid (emergency call system)
• CD Changer
• Bose premium sound system
Driver Assistance
Features:
• Cruise Control
• Rain-sensing wipers (optional)
🔧 Maintenance
Service Intervals
Service A Interval:
Typically around 10,000 miles or 1 year (whichever comes first), indicated by 'Service A' on the display.
Service B Interval:
Typically around 20,000 miles or 2 years (whichever comes first), indicated by 'Service B' on the display.
Major Service Items:
• Spark plug replacement (e.g., Bosch FGR7KQP+ or equivalent)
• Brake fluid change (every 2 years)
• Coolant flush and replacement
• Transmission fluid and filter change
• Differential fluid change
Fluid Specifications
Coolant Type:
MB 325.0 specification (Antifreeze/Coolant, typically ethylene glycol based)
Brake Fluid Type:
DOT 4 (SAE J1703 or ISO 4925 Class 4)
Known Issues
Common Problems:
• VARIO-ROOF hydraulic leaks/malfunctions
• Mass Air Flow (MAF) sensor issues
• Spark plug well oil leaks
• Cracked dashboard (UV exposure)
• Window regulator problems
• Ignition coil failures
📚 Vehicle History
Brand Heritage
Heritage:
Mercedes-Benz has a long history of producing premium sports cars and roadsters, dating back to models like the 300 SL 'Gullwing'.
Model Evolution
Generation:
R171 (Second Generation SLK-Class)
Previous Generation:
R170 (1996-2004)
Design Philosophy:
The R171 continued the SLK's reputation as a compact, stylish roadster with a focus on comfort and everyday usability, differentiating itself from more track-focused competitors.
Production
Manufacturing Location:
Bremen, Germany
Production Years For R171:
2004-2011
🏆 Awards & Recognition
Recognitions
Historical Awards:
While specific awards for the 2004 SLK320 are not prominently listed, the SLK-Class range generally received positive reviews for its design, performance, and innovative features like the VARIO-ROOF, contributing to Mercedes-Benz's reputation in the luxury roadster segment.
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