Engine Mechanical:
Engine assembly, cylinder head, pistons, crankshaft, camshafts, timing system, lubrication system, cooling system, engine management
Engine Performance:
Engine tuning, performance diagnostics, emissions control
Fuel System:
Fuel injection (ME 2.8, ME 2.8.1), fuel pump, fuel filter, fuel pressure regulation, EVAP system
Transmission Automatic:
5G-TRONIC (722.6) automatic transmission, torque converter, valve body, electronic control module (ETC), fluid changes
Suspension:
Active Body Control (ABC) system, hydraulic lines, accumulators, struts, control arms, bushings, springs, shock absorbers
Steering:
Hydraulic power steering system, steering rack, power steering pump, steering column, alignment specifications
Brakes:
Anti-lock Braking System (ABS), Electronic Stability Program (ESP), brake calipers, rotors, pads, brake fluid, parking brake, SBC (Sensotronic Brake Control) system details
Electrical System:
Battery, alternator, starter, ignition system, lighting (headlights, taillights, interior), wiring diagrams, fuses, relays
Body And Interior:
Body panels, doors, hood, trunk lid, convertible top mechanism (Vario-Roof), interior trim, seats, climate control system (HVAC)
Comfort Systems:
Power windows, power seats, heated seats, ventilated seats, memory seats, cruise control, keyless entry, remote operation
Infotainment And Navigation:
COMAND system, navigation unit, radio, CD player, speaker system, antenna systems
Safety Systems:
Airbag system (SRS), seatbelt pre-tensioners, occupant classification system
Routine Maintenance:
Oil changes, filter replacements, spark plug replacement, brake fluid flush, coolant flush, tire rotation
Troubleshooting:
Diagnostic trouble codes (DTCs), common fault diagnosis, step-by-step troubleshooting guides for various systems
Repair Procedures:
Component removal and installation, system overhauls, specific component repair
Diagnostic Procedures:
Use of Mercedes-Benz diagnostic tools (e.g., STAR Diagnosis), sensor testing, actuator testing, module programming
Calibration And Adjustment:
SBC system calibration, ABC system bleeding and pressurization, steering angle sensor calibration
Body Repair:
Body panel replacement, convertible top adjustment and repair, bumper repair
Depth Of Information:
Comprehensive, dealership-level detail
Level Of Detail:
Specific torque specifications, clearances, fluid capacities, wiring schematics, diagnostic flowcharts
NHTSA Front Crash Test Rating:
4 stars (driver), 4 stars (passenger)
IIHS Side Impact Rating:
Good
ABS:
Standard (Anti-lock Braking System)
Esp:
Standard (Electronic Stability Program)
Traction Control:
Standard
Sbc:
Standard on SL55 AMG, Optional/Available on SL500 (Sensotronic Brake Control)
Airbags:
Front dual-stage airbags, front side-impact airbags, knee airbags
Rollover Protection:
Integrated roll-over bar system (deployable)
Seatbelts:
Pre-tensioning front seatbelts with force limiters
Oil Change Interval:
Every 10,000 miles or 12 months, whichever comes first (check manual for specifics)
Major Service Interval:
Variable, often around 30,000 - 60,000 miles or 3-5 years, includes coolant, transmission fluid, spark plugs, brake fluid
Engine Oil Type:
SAE 0W-40 (MB Specification 229.5)
Engine Oil Capacity:
8.0 Liters (approx.) for M113, 8.5 Liters (approx.) for M113 ML
Coolant Type:
Mercedes-Benz approved Antifreeze/Coolant (G48 - Blue/Green)
Power Steering Fluid Type:
MB Specification 343.0 Hydraulic Fluid
Brake Fluid Type:
DOT 4 PLUS (MB Specification 331.0)
Abc System Fluid Type:
MB Specification 345.0 Hydraulic Fluid (or CHF 11S equivalent)
Abc System Leaks:
Common issue: hydraulic line leaks, pump failures, strut seal leaks due to age and heat
Sbc System Failures:
Potential for SBC hydraulic unit failure (requires replacement or specific repair procedure)
Vario Roof Mechanism:
Hydraulic leaks, sensor issues, or binding in the complex convertible top mechanism
Coil Packs:
Misfires due to failing ignition coil packs (especially on earlier M113 engines)
Mass Airflow Sensor:
Can become dirty or fail, leading to rough idle or poor performance
Active Body Control Pump Pulley:
Bearing failure in the ABC pump can lead to noise and eventual pump failure