Engine:
M156 6.2L V8 Naturally Aspirated, Engine mechanical, lubrication, cooling, fuel, ignition, emission control, engine management (ECU), timing system (double overhead camshafts, variable valve timing), cylinder heads, pistons, crankshaft, camshafts, oil pump, oil pan, intake manifold, exhaust manifold, catalytic converter, O2 sensors, throttle body, drive-by-wire system
Transmission:
722.9 '7G-Tronic' 7-speed Automatic Transmission, Transmission control module (TCM), gear selection, torque converter, clutch packs, valve body, gear sets, hydraulic system, automatic shifting strategies, transmission fluid specifications and change intervals
Drivetrain:
Rear-wheel drive (RWD), driveshaft, differential, axles, wheel bearings
Suspension:
ABC (Active Body Control) suspension system, hydraulic rams, accumulators, control unit, fluid specifications, hydraulic lines, suspension strut replacement, alignment specifications
Brakes:
High-performance braking system, ABS (Anti-lock Braking System), EBD (Electronic Brakeforce Distribution), BAS (Brake Assist), ESP (Electronic Stability Program), brake fluid specifications, bleeding procedures, brake pad and rotor replacement, caliper servicing, parking brake system
Steering:
Hydraulic power steering system, steering gear, steering column, power steering fluid, troubleshooting steering issues
Electrical System:
12V electrical system, battery, alternator, starter motor, fuses, relays, wiring diagrams for all circuits, multiplex communication systems (CAN bus), lighting systems (headlights, taillights, interior lights), power windows, power locks, power seats, sunroof, wipers
Body:
Body construction, panels, doors, hood, trunk lid, bumpers, body seals, glass replacement, door hardware, chassis components, corrosion protection
Climate Control:
Automatic climate control (THERMATIC/THERMOTRONIC), refrigerant specifications, A/C system servicing, HVAC components (compressor, condenser, evaporator, blower motor), cabin air filter replacement
Infotainment Navigation:
COMAND APS infotainment system, radio, CD/DVD changer, navigation system, Bluetooth connectivity, speaker systems, user interface, troubleshooting infotainment issues
Driver Assistance:
Distronic Plus (Adaptive Cruise Control), PARKTRONIC (Parking Assist), LANE KEEPING ASSIST, BLIND SPOT ASSIST, bi-xenon headlights with cornering function, PARKTRONIC parking sensors, rearview camera (if equipped)
Diagnostics:
OBD-II (On-Board Diagnostics II) system, diagnostic trouble codes (DTCs), scan tool procedures, Mercedes-Benz proprietary diagnostic tools (e.g., STAR DIAGNOSIS - described in manual), troubleshooting procedures based on DTCs
Maintenance:
Scheduled maintenance intervals, oil changes, filter replacements (oil, air, cabin, fuel), fluid checks and top-offs, spark plug replacement, belt inspection and replacement, brake fluid flush, coolant flush
Repair:
Engine component replacement (e.g., intake manifold, exhaust manifold, engine mounts), transmission repair and overhaul (major components), suspension component replacement (struts, control arms, ABC components), brake system repair (calipers, rotors, lines), steering system repair, electrical component diagnosis and replacement, body panel repair and replacement, interior trim removal and installation, HVAC system repair, infotainment system repair
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, symptom-based troubleshooting, electrical fault finding using wiring diagrams, diagnostic charts, performance issue diagnosis (engine, transmission, brakes)
Disassembly Assembly:
Detailed step-by-step instructions for the removal and installation of virtually all vehicle components, including torque specifications for critical fasteners
Special Tools:
Identification and usage of specialized Mercedes-Benz tools required for specific repair procedures
Technical Depth:
Comprehensive. Covers everything from basic fluid checks and filter replacements to complex engine and transmission overhauls, advanced electrical diagnostics, and bodywork repairs. Includes detailed torque specifications, component clearances, and diagnostic parameters.
Oil Change Interval:
Typically every 10,000 miles (16,000 km) or 12 months, whichever comes first, under normal driving conditions. Severe driving conditions may require more frequent changes. Refer to the manual for specific recommendations.
Transmission Service Interval:
Typically every 40,000-60,000 miles (64,000-96,000 km). Refer to manual for exact interval and fluid type for 7G-Tronic.
Brake Fluid Change Interval:
Every 2 years, regardless of mileage.
Coolant Change Interval:
Initial change at 150,000 miles or 15 years, subsequent changes every 75,000 miles or 7-8 years. Refer to manual.
Engine Oil Spec:
MB 229.5, SAE 0W-40 or 5W-40 synthetic
Transmission Fluid Spec:
MB 236.14 (ATF 722.9)
Brake Fluid Spec:
DOT 4 Plus (or Mercedes-Benz specified equivalent)
Power Steering Fluid Spec:
Hydraulic fluid (specific Mercedes-Benz specification to be confirmed in manual)
Coolant Spec:
Mercedes-Benz approved silicate-free antifreeze/coolant
Known Issues:
Potential issues may include ABC suspension component failures (e.g., strut leaks, pump issues), camshaft 'sprocket' wear (in earlier M156 versions, though less prevalent by 2010), valve cover gasket leaks, oil cooler leaks, and various electronic module failures. The manual provides troubleshooting for these and other common concerns.