Engine:
Internal Combustion Engine (Gasoline and Diesel), Engine Mechanical, Engine Electrical, Engine Management, Turbocharging, Emission Control Systems
Transmission:
Automatic Transmission (e.g., 7G-TRONIC), Transmission Control Module, Gearbox Mechanical, Transmission Fluid and Cooler Systems
Drivetrain:
All-Wheel Drive (4MATIC), Drive Shafts, Differentials, Axles, Wheel Hubs
Suspension:
Front Suspension, Rear Suspension, Air Suspension (AIRMATIC), Shock Absorbers, Springs, Control Arms, Bushings
Steering:
Power Steering System, Steering Column, Steering Rack, Power Steering Fluid
Brakes:
Hydraulic Brake System, Anti-lock Braking System (ABS), Electronic Stability Program (ESP), Brake Discs, Brake Pads, Brake Lines, Brake Fluid
Electrical System:
12V Battery System, Alternator, Starter Motor, Fuses, Relays, Wiring Diagrams, Lighting Systems (Headlights, Taillights, Interior), Horn
Body:
Body Panels, Doors, Hood, Tailgate, Bumpers, Glass, Seals, Exterior Trim, Interior Trim, Upholstery
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) System, Compressor, Condenser, Evaporator, Climate Control Module, Cabin Air Filter
Infotainment:
COMAND System, Audio System, Navigation System, Bluetooth Connectivity, Media Interface
Safety Systems:
Airbags, Seatbelts, Pre-tensioners, Restraint Systems, Parking Assist Systems, Lane Keeping Assist (if equipped)
General Maintenance:
Oil and Filter Changes, Air Filter Replacement, Cabin Air Filter Replacement, Spark Plug Replacement, Fluid Level Checks and Top-ups
Troubleshooting:
Diagnostic Trouble Codes (DTCs), Fault Finding Procedures, Symptom-Based Diagnosis
Engine Repair:
Engine Assembly/Disassembly, Cylinder Head Rebuild, Piston and Connecting Rod Installation, Crankshaft and Bearing Service, Timing Belt/Chain Replacement
Transmission Repair:
Transmission Overhaul, Torque Converter Replacement, Valve Body Service, Mechatronics Unit Repair
Suspension And Steering Repair:
Component Replacement (shocks, struts, control arms), Wheel Alignment Procedures, Power Steering Pump Replacement
Brake System Repair:
Brake Pad and Rotor Replacement, Brake Caliper Service, Brake Fluid Flush and Bleeding, ABS Component Replacement
Electrical System Repair:
Wiring Harness Repair, Sensor Replacement, Module Diagnosis and Replacement, Lighting System Repair
Body And Interior Repair:
Panel Repair and Replacement, Door Mechanism Service, Glass Replacement, Interior Trim Installation/Removal
HVAC System Repair:
Refrigerant Charging, Component Replacement (compressor, condenser), HVAC Control Module Diagnosis
Diagnostic Procedures:
On-Board Diagnostics (OBD-II), Diagnostic Scan Tool Usage, Specific System Diagnostics
Torque Specifications:
All critical fastener torque values for assembly and disassembly
Special Tools:
Identification and usage of Mercedes-Benz specific tools
Depth:
Comprehensive (From basic maintenance to complete engine and transmission rebuilds, including detailed diagnostics and electrical schematics)
NHTSA Front Driver:
5-Star (for applicable model years)
NHTSA Front Passenger:
5-Star (for applicable model years)
NHTSA Side Driver:
5-Star (for applicable model years)
NHTSA Side Passenger:
5-Star (for applicable model years)
IIHS Front Overlap Generic:
Good (for applicable model years)
Standard Active Safety:
ABS, Traction Control (ASR), Electronic Stability Program (ESP), Brake Assist (BAS), Tire Pressure Monitoring System (TPMS)
Optional Active Safety:
Distronic PLUS (Adaptive Cruise Control), Lane Keeping Assist, Blind Spot Assist, Pre-Safe System
Standard Passive Safety:
Front Airbags (Driver and Passenger), Side Airbags (Front), Curtain Airbags (Front and Rear)
Optional Passive Safety:
Rear Side Airbags, Active Head Restraints
Oil Change Interval Gasoline:
Every 10,000 miles or 12 months, whichever comes first (using synthetic oil)
Oil Change Interval Diesel:
Every 10,000 miles or 12 months, whichever comes first (using approved diesel synthetic oil)
Transmission Fluid Change:
Typically at 40,000 - 60,000 miles (refer to manual for specific service codes)
Air Filter Replacement:
Every 30,000 miles or as needed based on conditions
Cabin Air Filter Replacement:
Every 15,000 - 20,000 miles or annually
Engine Oil Spec:
MB 229.5 (Full Synthetic for gasoline), MB 229.51 or MB 229.52 (Low SAPS Full Synthetic for diesel)
Coolant Spec:
MB 325.0 (Glycol Ether Mixture)
Brake Fluid Spec:
DOT 4 Plus (or MB Spec 331.0)
Engine M272 V6:
Intake manifold runner flaps failure, balance shaft wear (on earlier models, leading to timing issues).
Engine Om642 Diesel:
Exhaust Gas Recirculation (EGR) valve issues, Diesel Particulate Filter (DPF) regeneration problems, AdBlue (DEF) system issues (on later models with SCR).
Air Suspension:
Leaking air springs (AIRMATIC), compressor failures, control module issues.
Electronics:
Various module failures (e.g., SAM units), CAN bus communication errors.
