Vehicle Segment:
Compact Premium Sports Roadster
Key Competitors 2015:
BMW Z4, Audi TT Roadster, Porsche Boxster
Model Highlight:
Retractable hardtop (VARIO-ROOF), premium interior, dynamic driving experience, Mercedes-Benz engineering.
Target Audience:
Owner DIY repairs, independent workshops, enthusiast mechanics.
Engine:
Detailed diagnostics, repair, overhaul procedures for all R172 engine variants (e.g., SLK200, SLK250, SLK350, SLK55 AMG).
Transmission:
Automatic and manual transmission service, repair, clutch replacement, torque converter.
Brakes:
Brake system diagnostics, hydraulic components, ABS, ESP, brake pad/rotor replacement, bleeding procedures.
Suspension Steering:
Front and rear suspension components, shock absorbers, springs, control arms, steering rack, power steering system.
Electrical System:
Comprehensive wiring diagrams, ECU troubleshooting, lighting, power windows, seats, infotainment, CAN bus systems.
Body Chassis:
Body panels, doors, hood, trunk, convertible roof mechanism, frame and chassis components.
Climate Control:
HVAC system diagnostics, refrigerant handling, A/C compressor, blower motor, climate control modules.
Fuel System:
Fuel pump, injectors, fuel filter replacement, fuel pressure testing, EVAP system.
Exhaust System:
Exhaust components, catalytic converter, muffler replacement, lambda sensors.
Maintenance:
Routine scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs.
Troubleshooting:
Diagnostic procedures for common and uncommon faults, fault code interpretation, symptom-based troubleshooting.
Repair:
Step-by-step repair instructions for all major components and systems.
Overhaul:
Complete engine and transmission rebuild procedures.
Diagnostics:
OBD-II diagnostics, sensor testing, actuator testing, module programming and coding.
Specifications Data:
Torque specifications, clearances, tolerances, fluid capacities, electrical data.
Depth Level:
Comprehensive (from basic maintenance to advanced diagnostics and full rebuilds).
Diagrams Illustrations:
Hundreds of detailed photos, exploded diagrams, and schematic illustrations.
Professional Standard:
Identical content to factory-issued service manuals used by professional mechanics.
Transmission Options Examples:
7G-TRONIC PLUS Automatic (7-speed), 6-speed Manual (on some base models)
Transmission Options Examples:
AMG SPEEDSHIFT MCT (7-speed) for SLK55 AMG
Transmission Features:
Selectable Drive Modes (Eco, Sport, Manual), Paddle Shifters
Length:
Approx. 4,134 mm (162.8 in)
Width:
Approx. 1,810 mm (71.3 in)
Height:
Approx. 1,301 mm (51.2 in)
Curb Weight Example:
Approx. 1,460 kg (3,219 lbs) for SLK250
NHTSA Ratings:
Typically 5-star overall safety rating (subject to specific testing for the model year and region).
Active Safety Systems:
ABS, ESP (Electronic Stability Program), Traction Control, Brake Assist (BAS), ATTENTION ASSIST (Driver Drowsiness Detection)
Passive Safety Features:
Front airbags, side airbags, rollover protection system (often pop-up roll bars), seatbelt pre-tensioners.
Infotainment System:
COMAND APS or Audio 20 with optional navigation, Bluetooth connectivity, USB interface.
Driver Assistance Features:
PARKTRONIC (Parking Assist), Blind Spot Assist, Lane Keeping Assist (optional packages).
Connectivity Options:
Bluetooth telephony and audio streaming, optional Mercedes-Benz Apps integration.
Oil Change Interval:
Typically every 10,000 - 15,000 miles or 12-24 months, depending on driving conditions (refer to specific manual for exact intervals).
Major Service Intervals:
Spark plugs, transmission fluid, brake fluid typically scheduled around 40,000 - 60,000 miles.
Engine Oil Type:
Refer to manual for specific MB-Approval 229.5 or 229.51 specification, typically synthetic 0W-40 or 5W-40.
Coolant Type:
MB-Approved Antifreeze (e.g., A0009890825), typically a blue G48 or similar silicate-free OAT coolant.
Brake Fluid Type:
DOT 4 Plus (MB Spec 331.0)
Transmission Fluid Type:
Specific MB-Approved ATF for 7G-TRONIC (e.g., MB 236.14) or manual transmission fluid (GL-4 or GL-5 depending on variant).
Common Issues R172:
Leaking oil cooler seals, potential issues with the convertible roof hydraulics/motors, occasional transmission control module faults, carbon build-up in direct-injection engines.
