Engine Mechanical:
Engine assembly, cylinder head, crankshaft, pistons, connecting rods, camshafts, valve train, timing system, lubrication system, cooling system, fuel delivery system (mechanical components).
Engine Electrical:
Engine control unit (ECU) diagnostics, ignition system, starter system, charging system, sensors (crankshaft position, camshaft position, oxygen, coolant temperature, MAP/MAF, etc.), actuators (fuel injectors, ignition coils, throttle body), emissions control systems.
Transmission Automatic:
Transmission assembly, torque converter, valve body, gear sets, clutches and bands, transmission control module (TCM), shift solenoids, sensors, fluid circuits, and maintenance procedures.
Drivetrain:
Front and rear differentials, axles, CV joints, driveshafts, transfer case (if applicable).
Suspension:
Front and rear suspension components (struts, shock absorbers, control arms, ball joints, tie rod ends, bushings), springs, anti-roll bars, height control systems (if equipped), wheel alignment specifications.
Steering:
Steering column, steering gear, power steering system (hydraulic or electric), steering rack, tie rods, linkages, steering angle sensor.
Brakes:
Brake system components (discs, pads, calipers, master cylinder, brake booster, ABS modulator, hydraulic lines), parking brake system, brake fluid specifications, bleeding procedures, wear indicators.
Electrical System:
Battery, charging system, starter, lighting systems (headlights, taillights, interior lights), power windows, power locks, mirrors, wipers, horn, fuses, relays, wiring diagrams, body control module (BCM) functions.
Body And Chassis:
Body panels, doors, hood, tailgate, bumpers, glass, seals, interior trim, chassis frame, structural components, rust prevention, and repair procedures.
HVAC:
Heating, ventilation, and air conditioning (HVAC) system operation, refrigerant handling, compressor, condenser, evaporator, blower motor, climate control module, cabin air filter replacement.
Infotainment And Electronics:
Audio system, navigation system, communication modules (Bluetooth, cellular), instrument cluster, control modules, diagnostic port (OBD-II), CAN bus communication.
Routine Maintenance:
Oil and filter changes, air filter replacement, cabin air filter replacement, spark plug replacement, fluid checks and top-offs (coolant, brake fluid, power steering fluid, transmission fluid, windshield washer fluid).
Scheduled Maintenance:
Detailed service intervals for various components and fluids based on mileage and time.
Troubleshooting Diagnostics:
Step-by-step diagnostic procedures for identifying and resolving common and complex issues, including symptom-based troubleshooting guides and fault code interpretations.
Component Removal Installation:
Detailed instructions for removing and installing virtually every component of the vehicle, from minor parts to major assemblies.
Repair Rebuild:
Procedures for repairing or rebuilding major components such as engines, transmissions, and suspension parts.
Electrical Component Testing:
Methods for testing sensors, actuators, relays, and other electrical components using multimeters and diagnostic tools.
Wiring Diagrams:
Comprehensive and color-coded wiring diagrams for all vehicle systems, facilitating electrical troubleshooting.
Body Repair:
Procedures for dent repair, panel replacement, rust repair, and paintwork preparation.
Specifications And Tolerances:
Detailed technical specifications, torque values, clearances, and alignment settings for all serviceable parts.
Depth Of Coverage:
Comprehensive, covering all aspects from basic maintenance to advanced repairs and diagnostics, suitable for professional technicians and advanced DIY enthusiasts.
Oil Change Interval:
Typically every 10,000 miles or 1 year, subject to Mercedes-Benz Flexible Service System (Assyst).
Transmission Service Interval:
Manufacturer recommendation often around 60,000-80,000 miles for fluid and filter change, but subject to driving conditions and specific Mercedes-Benz recommendations.
Major Service Points:
Includes spark plugs (around 60,000-100,000 miles depending on type), coolant flush, brake fluid replacement (typically every 2 years).
Engine Oil Specification:
MB 229.5 or MB 229.51 (synthetic oil, e.g., SAE 0W-40, 5W-40, 5W-30 depending on climate and specific engine).
Transmission Fluid Specification:
MB 236.10 or MB 236.12 (for 7G-TRONIC automatic transmission).
Coolant Specification:
Mercedes-Benz approved coolant (e.g., G48, BLUE) - typically a 50/50 mix with distilled water.
Brake Fluid Specification:
DOT 4 Plus (or MB equivalent).
Common Problems Engine:
M272 V6 engines can suffer from balance shaft wear (leading to check engine light and timing issues), intake manifold flap failures, and oil cooler leaks.
Common Problems Transmission:
7G-TRONIC can experience torque converter issues, solenoid failures, or mechatronic unit problems if not properly maintained.
Common Problems Suspension:
Air suspension components (if equipped) can develop leaks. Control arm bushings and ball joints are wear items.
Common Problems Electrical:
Faulty CAN bus modules, sensor failures (e.g., crankshaft position sensor), and issues with power window regulators or tailgate struts.
