🏷️ Basic Information

Make:

Mercedes-Benz

Model:

SLK-Class

Model Code:

R170

Year:

2003

Generation:

First Generation (R170)

Chassis Code:

R170

👋 Introduction

Market Position:

The Mercedes-Benz SLK-Class R170 represented a significant entry into the compact premium roadster segment, blending sports car performance with Mercedes-Benz luxury and innovation, particularly its retractable hardtop.

Competitive Analysis:

Competed directly with models like the BMW Z3, Porsche Boxster, and Audi TT, often distinguished by its innovative Vario-Roof (retractable hardtop) and refined driving dynamics.

Key Features:

Retractable vario-roof, compact roadster design, rear-wheel drive, emphasis on safety and luxury, available supercharged engines.

📋 Manual Details

Coverage Areas:

Engine, Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Bodywork, Interior, Convertible Top System, Diagnostic Procedures, Troubleshooting, Wiring Diagrams.

Page Count:

Extensive (specific number not provided, described as 'hundreds of pages')

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

Digital Download (printable)

📖 Manual Coverage

Engine:

Detailed service, repair, and overhaul procedures for all engine variants offered in 2003, including diagnostics, component replacement, and performance tuning.

Drivetrain:

Coverage includes manual and automatic transmissions, clutch, driveshafts, differentials, and rear axle assembly. Repair and replacement procedures are detailed.

Suspension Steering:

Front and rear suspension components, shock absorbers, springs, anti-roll bars, steering system (rack and pinion, power steering), wheel alignment specifications.

Brakes:

Front and rear brake systems (discs/drums), ABS, EBD, brake fluid specifications, bleeding procedures, caliper and rotor replacement, parking brake.

Electrical System:

Comprehensive electrical schematics, wiring diagrams for all systems, starter, alternator, battery, lighting, ignition system, sensors, actuators, fuses, and relays.

HVAC:

Air conditioning system diagnosis and repair, heater core, blower motor, climate control unit, refrigerant specifications and handling procedures.

Bodywork:

Exterior body panel removal and installation, door mechanisms, bumpers, trim, convertible top mechanism operation and repair, weatherstripping.

Interior:

Dashboard removal, seat mechanisms, interior trim panels, airbag system components and precautions, seat belts.

Convertible Top System:

Detailed diagnostics, hydraulic system service, actuator replacement, sensor calibration, and troubleshooting for the Vario-Roof system.

Maintenance:

Scheduled maintenance tasks, fluid and filter changes, spark plug replacement, belt replacement, lubrication points, brake pad replacement.

Troubleshooting:

Systematic diagnostic charts, common fault codes, symptom-based troubleshooting guides for various vehicle systems.

Repair Rebuild:

Step-by-step repair and overhaul procedures for major components, including engine assembly, transmission rebuilds, and suspension overhauls.

Diagnostics:

Procedures for using diagnostic tools (e.g., STAR DIAGNOSIS), interpreting diagnostic trouble codes (DTCs), and performing system checks.

Wiring Diagrams:

Detailed wiring schematics for engine control, body electronics, lighting, comfort systems, and powertrain.

Technical Depth:

Comprehensive, covering everything from basic preventative maintenance to advanced engine rebuilds, electrical system diagnostics, and convertible top hydraulics.

📊 Manual Specifications

File Format:

PDF (Portable Document Format)

Print Quality:

High resolution, suitable for clear printing of text and diagrams.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine Variant:

SLK 200 Kompressor (Supercharged)

Engine Code:

M111 E20 ML (Supercharged)

Displacement:

1998 cc (2.0 Liters)

Cylinders:

Inline 4-cylinder

Valvetrain:

DOHC (Dual Overhead Camshafts), 4 valves per cylinder

Horsepower:

163 hp @ 5300 rpm (for SLK 200 Kompressor)

Torque:

230 Nm (170 lb-ft) @ 2500-4800 rpm (for SLK 200 Kompressor)

Fuel Injection:

Electronic Fuel Injection (Bosch Motronic ME 2.8)

Induction:

Supercharged (Roots-type or similar)

Cooling System:

Liquid-cooled, pressurized system with electric fan.

Ignition System:

Distributorless ignition system (DIS) with individual coil packs.

🔧 Transmission

Standard Transmission:

5-speed Manual Transmission

Optional Transmission:

5-speed Automatic Transmission (with TouchShift)

Transmission Features:

Rear-wheel drive, rear axle differential.

Transmission Fluid Manual:

MB 235.10 (or equivalent GL-4 rated gear oil)

Transmission Fluid Automatic:

MB 236.10 (ATF LT 71141 or equivalent)

📐 Dimensions

Length:

Approx. 3995 mm (157.3 in)

Width:

Approx. 1740 mm (68.5 in)

Height:

Approx. 1290 mm (50.8 in)

Wheelbase:

Approx. 2075 mm (81.7 in)

Curb Weight:

Approx. 1340 kg (2954 lbs) for SLK 200 Kompressor Manual

Cargo Volume Trunk:

Approx. 145 liters (5.1 cu ft) with roof up, 52 liters (1.8 cu ft) with roof down.

🛡️ Safety Features

Crash Test Ratings:

While specific 2003 NHTSA/IIHS ratings may vary by region, Mercedes-Benz vehicles of this era generally emphasized safety through robust chassis design and advanced restraint systems. The R170 typically performed well in impact tests.

Active Safety Features:

ABS (Anti-lock Braking System), ASR (Acceleration Skid Control), ESP (Electronic Stability Program) may be standard or optional depending on market and specific trim.

Passive Safety Features:

Front airbags, side airbags, rollover protection bars (integrated behind seats), 3-point seat belts with pre-tensioners, crumple zones.

💡 Technology Features

Infotainment System:

Base COMAND (Cockpit Management and Navigation Display) or Audio 30/50 APS radio systems, optional CD changer, navigation system.

Driver Assistance Features:

ABS, ASR, optional ESP, cruise control.

Connectivity Options:

Optional integrated cellular phone system (early Bluetooth or analog/digital).

🔧 Maintenance

Engine Oil Change Interval:

Typically every 15,000 km (9,300 miles) or 12 months, whichever comes first, using synthetic oil.

Oil Filter Replacement:

Replace with every oil change.

Air Filter Replacement:

Recommended every 30,000 km (18,600 miles) or as needed based on driving conditions.

Cabin Filter Replacement:

Recommended annually or every 15,000 km (9,300 miles).

Brake Fluid Flush:

Every 2 years.

Engine Oil Specification:

SAE 0W-40 or 5W-40, meeting MB-Approval 229.3 or 229.5.

Coolant Specification:

MB 325.0 / 326.0 (Antifreeze/Coolant concentrate, typically a 50/50 mix with deionized water).

Power Steering Fluid:

MB 236.3 (or Pentosin CHF 11S for specific systems).

Engine Oil Capacity:

Approx. 5.5 Liters (5.8 US Quarts) with filter change for 2.0L engine.

Known Issues:

Common issues can include problems with the Vario-Roof hydraulic system (leaks, pump failure), mass airflow sensor (MAF) issues leading to rough idle, oil leaks from the crankcase or valve cover gaskets, and occasional issues with the electronic stability program (ESP) sensors.

📚 Vehicle History

Brand Heritage:

Mercedes-Benz, a pioneer in automotive engineering and luxury, has a long history of producing high-quality vehicles, including iconic sports cars and roadsters like the 300 SL Gullwing and the SLC models.

Model Evolution R170:

The R170 generation of the SLK was introduced in 1996, notable for its innovative retractable hardtop (Vario-Roof). The 2003 model year represents a facelifted version with updated styling and powertrain options.

Production Years:

1996-2004

Production Location:

Bremen, Germany

🏆 Awards & Recognition

Recognitions:

The SLK-Class, particularly its innovative Vario-Roof, received considerable automotive press attention and awards for its engineering and design upon introduction. Specific awards for the 2003 model year would reflect updates and refinements.