Engine Mechanical:
Engine assembly, cylinder head, block, crankshaft, pistons, camshafts, timing systems (chain/belt), lubrication, cooling.
Engine Management:
Fuel injection systems (MPI/GDI), ignition systems, engine control units (ECU), emissions control, exhaust systems.
Transmission Manual:
Clutch, gearbox internals, shift mechanisms, driveshafts, differential (if applicable).
Transmission Automatic:
Torque converter, valve body, planetary gear sets, electronic control, fluid and cooling.
Brakes System:
Hydraulic systems, ABS, ESP, SBC (Sensotronic Brake Control) on applicable models, brake pads, rotors, lines, calipers, parking brake.
Suspension Steering:
Front and rear suspension components (struts, shocks, control arms, bushings), steering rack, power steering system, wheel alignment.
Electrical System:
Battery, charging system (alternator), starter, lighting, fuses, relays, wiring diagrams, body control modules (BCM).
Body Exterior:
Body panels, doors, windows, mirrors, bumpers, hood, trunk, convertible top (if applicable), paint and corrosion protection.
Body Interior:
Seats, dashboard, trim panels, climate control system, airbags, seatbelts, headliner.
Climate Control:
HVAC system, A/C compressor, evaporator, condenser, refrigerant handling, climate control unit.
Infotainment Nav:
Audio systems, navigation systems (COMAND), display units, telematics, Bluetooth connectivity.
Safety Systems:
Airbag deployment, seatbelt pre-tensioners, ABS, ESP, tire pressure monitoring system (TPMS).
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-ups, brake inspections, tire rotations, spark plug replacement.
Diagnostic Troubleshooting:
Fault code interpretation, symptom-based troubleshooting, electrical circuit testing, component diagnosis.
Component Removal Installation:
Step-by-step guides for removing and reinstalling major components like engines, transmissions, suspension parts, body panels.
Engine Rebuild:
Detailed instructions for engine disassembly, cleaning, inspection, and reassembly, including torque specifications and tolerances.
Transmission Overhaul:
Procedures for automatic transmission disassembly, component replacement, and reassembly, including hydraulic circuit testing.
Brake System Repair:
Brake pad/rotor replacement, caliper service, hydraulic bleeding, ABS/ESP component replacement and bleeding procedures.
Electrical Component Replacement:
Alternator, starter, fuel pump, various sensors, control modules (ECU, TCU, BCM), lighting fixtures.
Bodywork Repair:
Panel replacement, dent repair, rust prevention, door and window mechanism repair.
Climate Control Service:
Refrigerant system servicing, component replacement (compressor, condenser, evaporator), leak testing, blower motor replacement.
Special Tools Procedures:
Identification and use of specialized tools required for specific repairs and diagnostics.
Diagnostic Capability:
Advanced diagnostics with detailed troubleshooting trees and logic, covering ECU fault codes and sensor data analysis.
Repair Scope:
Comprehensive coverage from basic scheduled maintenance to complete engine and transmission rebuilds, including structural repairs.
Electrical Diagrams:
Detailed wiring diagrams for all vehicle systems, including component locations and connector pinouts.
Specifications Tolerances:
Precise torque specifications, clearances, and material specifications for all adjustable and replaceable components.
Troubleshooting Guides:
Systematic approaches to diagnosing and resolving common and uncommon vehicle faults.
Oil Service:
Typically every 10,000-15,000 miles or 12 months, depending on driving conditions (Flexible Service System - ASSYST).
Major Service:
Scheduled around 30,000-60,000 miles intervals, including spark plug replacement, transmission fluid change (depending on variant), coolant flush, brake fluid flush.
Engine Oil:
API SN, ACEA A3/B4, MB-Approval 229.5 or 229.51 (specific viscosity dependent on engine and climate, e.g., 0W-40, 5W-40, 5W-30).
Transmission Fluid Auto:
MB-Approval 236.10, 236.12, or 236.14 for 7G-TRONIC (e.g., Shell ATF 134, Fuchs Titan ATF 4134).
Coolant:
MB-Approval 325.0 or 326.0 (Antifreeze/Coolant Concentrate, blue or green).
Brake Fluid:
DOT 4 (MB-Approval 331.0 or 402.0).
Common Problems:
Oversized oil consumption on some M271 engines, SBC system failures (requiring replacement), MAF sensor issues, rust on wheel arches and sills, sunroof drain blockages, catalytic converter failure on some models.
