Engine:
Detailed diagnostics, repair, and overhaul procedures for all engine variants
Engine Management:
Engine control systems, sensors, actuators, electronic control unit (ECU) diagnostics
Fuel System:
Fuel delivery, injection systems, fuel pump, injectors, fuel pressure specifications
Cooling System:
Radiator, thermostat, water pump, cooling fan, coolant specifications, pressure testing
Lubrication System:
Oil pump, oil filter, oil pressure, oil specifications
Ignition System:
Spark plugs, ignition coils, ignition timing, diagnostic procedures
Charging System:
Alternator, battery, voltage regulator, charging system testing
Automatic Transmission:
All automatic transmission models, including torque converter, valve body, internal components, fluid specifications, repair procedures
Manual Transmission:
All manual transmission models, clutch assembly, gears, bearings, repair procedures
Drivetrain:
Driveshaft, differential, axle shafts, universal joints, repair and overhaul
Suspension System:
Front and rear suspension components, springs, shock absorbers, control arms, bushings, alignment specifications
Wheel And Tire:
Wheel specifications, tire pressure, lug nut torque, balancing and mounting procedures
Brake Control System:
ABS, ESP, brake booster, master cylinder, hydraulic lines, diagnostic procedures
Brake System:
Brake pads, rotors, calipers, brake fluid specifications, bleeding procedures, parking brake system
Steering System:
Steering column, steering rack, power steering pump, fluid specifications, repair procedures
Air Conditioning:
Refrigerant specifications, system diagnostics, compressor, evaporator, condenser, repair procedures
Supplemental Restraint System:
Airbag system, SRS warning lights, seat belt pre-tensioners, diagnostic and replacement procedures
Seat Belts:
Seat belt operation, adjustment, and replacement
Engine Immobilizer:
Immobilizer system operation and troubleshooting
Cruise Control:
Cruise control system diagnostics and repair
Wiper And Washer System:
Wiper motor, washer pump, fluid replacement, blade replacement
Door And Lock System:
Door mechanisms, central locking, keyless entry, repair procedures
Meter And Audio Visual:
Instrument cluster, audio system, navigation system, speaker replacement
Horn:
Horn operation and replacement
Windshield Glass Mirror:
Windshield replacement, mirror adjustment and replacement
Instrument Panel:
Instrument cluster removal and installation, gauge diagnostics
Seats:
Seat adjustment mechanisms, seat heating/ventilation systems (if applicable), removal and installation
Body And Exterior:
Hood, doors, bumpers, fenders, trim components, repair and replacement
Interior Trim:
Dashboard, door panels, headliner, console removal and installation
Electrical System:
Complete electrical system diagrams, component testing, wiring repair
Multiplex Communication:
CAN (Controller Area Network) bus system diagnostics and troubleshooting
Emission Control:
Emission control systems, catalytic converter, oxygen sensors, EVAP system, diagnostic procedures
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks, inspections
Diagnostics:
Comprehensive troubleshooting guides for all systems, including symptom-based diagnostics and error code interpretation
Repair:
Step-by-step repair instructions for virtually all components and systems
Rebuilding:
Detailed procedures for rebuilding engines, transmissions, and other major components
Installation:
Procedures for installing new or replacement parts
Depth:
Factory high-detail, technician-level information
Documentation Type:
Includes step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications
Oil Change Interval:
Typically every 15,000 km (9,300 miles) or 12 months, whichever comes first, depending on driving conditions and engine oil type (e.g., ASSYST PLUS service interval indicator system).
Engine Oil:
MB 229.5 or MB 229.51 (e.g., SAE 0W-40, 5W-40, 5W-30 depending on engine and climate) - specific recommendation in manual.
Coolant:
Mercedes-Benz approved G48 coolant (antifreeze/anti-corrosion) mixed with distilled water at a 50/50 ratio.
Brake Fluid:
DOT 4 Plus (MB 331.0)
Transmission Fluid Auto:
MB 236.14 (e.g., for 7G-TRONIC PLUS)
Transmission Fluid Manual:
Specific gear oil grade depending on transmission type, typically API GL-4 or GL-5.
Common Wear Items:
While the R172 is generally reliable, typical wear items include brake components, suspension bushings, tires, and potentially the retractable hardtop mechanism over time. The manual will detail inspection and replacement procedures.