Engine Mechanical:
Engine assembly, disassembly, overhaul, cylinder head, crankshaft, pistons, connecting rods, timing system, lubrication system, cooling system
Engine Management:
Engine control unit (ECU) diagnosis, fuel injection system, ignition system, emissions control system, sensors and actuators
Transmission Automatic:
Transmission assembly, disassembly, torque converter, valve body, planetary gears, clutches, seals, transmission control unit (TCU) diagnosis, fluid service
Drivetrain:
Front axle, rear axle, differential, drive shafts, CV joints, 4MATIC all-wheel drive system components
Suspension:
Front suspension, rear suspension, shock absorbers, struts, springs, control arms, bushings, wheel bearings
Steering:
Power steering system, steering rack, steering column, power steering pump, fluid specifications
Brakes:
Brake system components, brake pads, brake discs, calipers, master cylinder, brake lines, ABS (Anti-lock Braking System), ESP (Electronic Stability Program), SBC (Sensotronic Brake Control) if applicable, brake fluid specifications
Electrical System:
Battery, alternator, starter motor, wiring diagrams, fuses, relays, lighting systems (headlights, taillights, interior), horn
Body And Chassis:
Body panels, doors, hood, trunk, bumpers, interior trim, chassis components, corrosion protection
Climate Control:
HVAC system, air conditioning system, heater core, blower motor, refrigerant specifications, climate control unit
Infotainment And Navigation:
COMAND system, audio system, navigation system, Bluetooth connectivity, media interface
Driver Assistance Systems:
Adaptive Cruise Control (DISTRONIC PLUS), Blind Spot Assist, Lane Keeping Assist, PARKTRONIC, rearview camera, parking sensors
Routine Maintenance:
Oil changes, filter replacements (oil, air, cabin), spark plug replacement, fluid checks and top-offs
Scheduled Maintenance:
Service A and Service B procedures, timing belt/chain inspection and replacement (if applicable), brake fluid flush, coolant flush
Repair Procedures:
Step-by-step instructions for component removal, installation, and adjustment
Troubleshooting:
Diagnostic procedures, symptom-based troubleshooting guides, common fault identification
Diagnostic Codes:
OBD-II (On-Board Diagnostics II) code interpretation and repair strategies
Electrical Diagnostics:
Wiring diagram interpretation, circuit testing, component testing
Depth:
Comprehensive, from basic maintenance to complete engine and transmission rebuilds
Illustrations:
Hundreds of detailed photos and exploded diagrams
Data Format:
Step-by-step instructions, torque specifications, clearances, wiring schematics
NHTSA Rating:
Generally rated highly, often 5-star overall in its class (specific model year ratings apply)
IIHS Rating:
Typically received 'Good' ratings in various crash tests (check specific 'Top Safety Pick' designations)
ABS:
Standard Anti-lock Braking System
Esp:
Standard Electronic Stability Program
Traction Control:
Standard Traction Control System (TCS)
Driver Assistance:
Optional features like Blind Spot Assist, Lane Keeping Assist, Pre-Safe system
Airbags:
Front, side, curtain airbags
Seatbelts:
3-point inertia-reel seatbelts with belt tensioners and force limiters
Oil Change Interval:
Typically every 10,000 miles or 12 months (flexible service system - ASSYST)
Major Service Intervals:
Service A and Service B, occurring based on the ASSYST system's calculations or mileage benchmarks (e.g., ~20,000 miles for certain inspections)
Engine Oil:
MB 229.5 or MB 229.51 (e.g., Mobil 1 ESP 0W-40, Castrol EDGE Professional C3 0W-30 - check owner's manual for specific engine variant)
Transmission Fluid:
MB 236.14 (for 7G-TRONIC PLUS)
Coolant:
MB 325.0 / MB 326.0 (Concentrate, mix 50/50 with distilled water) - typically a blue ethylene glycol-based coolant
Brake Fluid:
DOT 4 Plus (MB Spec 331.0)
Engine M272 V6:
Timing chain guide wear (can lead to rattling noise and potential failure), intake manifold flap issues
Engine Om642 Diesel:
Intake manifold runner issues, diesel particulate filter (DPF) clogging, glow plug failure
Transmission 7G Tronic:
Mechatronics unit failure, torque converter seal leaks
Suspension:
Control arm bushings and ball joints wear over time, leading to clunks and alignment issues
Electrical:
Window regulator failure, CAN bus communication errors, sensor failures