Engine Mechanical:
Engine assembly, cylinder head, crankshaft, pistons, connecting rods, valve train, lubrication, cooling systems
Engine Management:
Fuel injection system (CDI), ignition system, emissions control, engine control module (ECM) diagnostics and programming
Transmission:
722.6 (5-speed automatic transmission) - overhaul, diagnostics, control module, fluid specifications, torque converter
Drivetrain:
All-wheel drive (4MATIC) system, differentials, drive shafts, CV joints
Suspension:
Front and rear suspension components, springs, shock absorbers/struts, control arms, bushings, air suspension system (if equipped), alignment specifications
Brakes:
Front and rear brake systems, ABS, ESP, SBC (Sensotronic Brake Control) if applicable, brake fluid specifications, hydraulic components, rotor and pad replacement
Steering:
Power steering system, steering column, steering rack, tie rods, power steering fluid
Electrical System:
12V battery system, alternator, starter, wiring diagrams, fuses, relays, lighting systems (headlights, taillights, interior), power accessories
Body And Interior:
Body panels, doors, hood, tailgate, bumpers, interior trim, seats, HVAC system, power windows, power locks, mirrors
HVAC:
Climate control system, A/C compressor, refrigerant, cabin filter, blower motor, actuators, diagnostic procedures
Infotainment And Electronics:
COMAND system, navigation, audio system, telematics, instrument cluster, driver information system
Safety Systems:
Airbag system (SRS), seatbelt pre-tensioners, ISOFIX child seat anchors, warning lights
Routine Maintenance:
Oil and filter changes, air filter replacement, cabin filter replacement, spark plug replacement, brake fluid flush, coolant flush, belt inspection and replacement
Diagnostic Procedures:
Troubleshooting guides, fault code retrieval and interpretation, system-specific diagnostic routines, wiring diagram interpretation
Repair Procedures:
Step-by-step instructions for component replacement, assembly and disassembly, component testing, calibration procedures
Overhaul Procedures:
Engine and transmission overhaul, differential and drive axle rebuild
Component Replacement:
Alternator, starter, fuel pump, water pump, A/C compressor, power steering pump, brake calipers, master cylinder, suspension components, exhaust system
Electrical Component Diagnosis:
Diagnosing and replacing sensors, actuators, control modules, switches, wiring harnesses
Body Repair:
Panel replacement, door adjustment, bumper repair, glass replacement
Depth Level:
Comprehensive: Covers basic maintenance to complex repairs and diagnostics
Diagnostic Tools:
References proprietary Mercedes-Benz diagnostic tools (e.g., STAR Diagnosis) and procedures for their use
Torque Specifications:
Detailed torque specifications for all critical fasteners
Special Tools:
Identification and usage of special tools required for specific repair procedures
Oil Change Interval:
Every 10,000 miles or 12 months, whichever comes first (under normal driving conditions). Consult manual for severe conditions.
Transmission Service Interval:
Approximately every 40,000-60,000 miles for fluid and filter change. Check manual for specific recommendations.
Brake Fluid Change:
Every 2 years (recommended)
Engine Air Filter:
Inspect every 15,000 miles, replace as needed. Typically every 30,000 miles.
Cabin Air Filter:
Inspect every 15,000 miles, replace as needed. Typically every 15,000-20,000 miles.
Fuel Filter:
Diesel Particulate Filter (DPF) regeneration managed by ECU. Replace if fails. See manual for specific filter replacement intervals.
Engine Oil:
SAE 5W-40 or 0W-40 meeting MB Approval 229.51 or 229.52 specifications
Coolant:
Mercedes-Benz Approved Antifreeze/Coolant (e.g., G05 or equivalent) mixed 50/50 with distilled water
Power Steering Fluid:
Pentosin CHF 11S or equivalent (MB Part No. A000989880310)
Diesel Particulate Filter:
Clogging of the DPF due to short trips or insufficient regeneration cycles. Symptoms include loss of power, check engine light.
Egr Valve:
EGR valve can become carboned up and cause rough running or engine fault codes.
Air Suspension:
Leaking air springs, compressor failures, or valve block issues can lead to ride height problems.
Glow Plugs:
Failure of one or more glow plugs can lead to hard starting in cold weather.
Oil Cooler Seals:
Leaking seals on the oil cooler can lead to coolant loss or oil contamination.