Engine And Drivetrain:
Engine oil/filter, valve clearance, idle speed, injection timing, fuel filter, air filter, V-belts, poly V-belt, manifolds, oxygen sensor, spark plugs, cooling system, engine mounts, clutch, manual transmission, automatic transmission, transfer case, steering, axles, drive shaft.
Suspension And Brakes:
Suspension inspection, body structure, water leakage/corrosion, level control (ADS, 4MATIC), self-leveling suspension, front axle, ball joints, rear axle, wheels, tires, brake fluid, brake lines, brake pads/discs, parking brake, steering system.
Electrical And Body:
Battery, warning lamps, door hinges, door locks, hydraulic top, sunroof, windshield washer, antenna mast, headlamps, exterior lamps, windshield wipers, AC refrigerant, dust filter, charcoal filter, recirculating air filter, folding side mirrors, hood lubrication, safety belts, backrest lock, noise encapsulation panels, paint damage.
Fuel System:
Detailed inspection and repair of fuel pump, lines, injectors, and pressure regulators.
Cooling System:
Radiator, water pump, thermostat, hoses, heater core, and fan clutch inspection and replacement.
Exhaust System:
Inspection and tightening of exhaust manifold seating and system connections, oxygen sensor replacement.
Maintenance Procedures:
Oil and filter changes, fluid level checks and correction, filter replacements, belt inspections and adjustments, spark plug replacement, coolant replacement, lubrication, cleaning.
Diagnostic Procedures:
Component condition inspection, line and hose inspection, idle speed adjustment, injection timing checks and adjustments, leak detection, tire pressure correction, steering play checks, brake system tests.
Repair Procedures:
Component replacement (filters, sensors, plugs, belts), fluid system servicing (transmission, transfer case, clutch), brake component servicing, suspension component checks.
Engine Rebuilding:
Covers engine disassembly, inspection, and reassembly procedures, including torque specifications and component clearances.
Depth:
Factory-level diagnostic, maintenance, and repair procedures, equivalent to dealer-level information.
Diagnostics:
Detailed troubleshooting guides for various systems, including electrical faults and engine performance issues.
Oil Change Interval:
Typically every 7,500-10,000 miles or 12 months, depending on driving conditions and oil type used (refer to manual for specific recommendations).
Transmission Service:
Automatic transmission fluid and filter change recommended every 30,000-50,000 miles.
Engine Oil:
Refer to manual for specific viscosity (e.g., 10W-40, 5W-40 synthetic) and MB approval codes (e.g., MB 229.1 or 229.5 for later spec oils).
Automatic Transmission Fluid:
MB 236.6 (e.g., Pentosin ATF 1 or equivalent).
Coolant:
Mercedes-Benz approved G48 coolant (blue-green) or equivalent silicate-free antifreeze.
Wiring Harness:
Can suffer from insulation degradation, leading to electrical issues. The manual would detail inspection and repair of such issues.
Head Gaskets:
While not as prevalent as some other models, the M119 engine can develop head gasket leaks over time. The manual covers procedures for gasket replacement.
Climate Control System:
Can develop leaks or actuator failures. Manual covers system checks and component replacement.
Suspension Hydraulics:
Potential for leaks in self-leveling suspension or ADS (Active Damping System). Manual details fluid level checks and component servicing.
