Positioning:
Comfort, luxury, and refined engineering
Competitors:
BMW 5 Series, Audi A6, Lexus GS
Powertrain:
Smooth and reliable M104 inline-six engine, advanced 722.6 automatic transmission
Design:
Aerodynamic W210 styling, spacious and luxurious interior
Technology:
Available features like integrated climate control, power seats with memory
Engine:
M104 (3.2L Inline-6) - Detailed diagnostics, overhaul, timing, fuel injection, cooling, exhaust
Transmission:
722.6 (5-Speed Automatic) - Diagnostics, fluid service, electronic control unit (ECU) troubleshooting, component replacement
Brakes:
ABS, ESP (if equipped), hydraulic system, brake pads, rotors, calipers, bleeding procedures
Suspension Steering:
Front MacPherson struts, rear multi-link, power steering system, alignment specifications, component replacement
Electrical:
Wiring diagrams, fuse box locations, diagnostic trouble codes (DTCs), starter, alternator, battery, lighting, power accessories, body control modules (BCMs)
Climate Control:
Automatic climate control (ACC), HVAC system operation, refrigerant service, component diagnostics
Body Chassis:
Body repair, panel replacement, interior trim, door mechanisms, glass replacement, chassis components
Maintenance:
Scheduled maintenance intervals, oil changes, filter replacements, fluid checks and changes, spark plug replacement
Troubleshooting:
Diagnostic charts, common problems and solutions, symptom-based troubleshooting guides
Repair:
Step-by-step instructions for component removal, installation, and overhaul
Diagnostics:
On-board diagnostics (OBD-II) system, scan tool usage, interpreting sensor data
Emission Control Systems:
Diagnostics and repair of emission control components, catalytic converter, O2 sensors, EVAP system.
Fuel System Repair:
Fuel pump replacement, fuel filter replacement, fuel injector service, fuel pressure testing.
Lighting And Signals:
Headlight bulb replacement, taillight repair, turn signal systems, fog lights.
Body Panel Alignment:
Information on door, hood, and trunk alignment for proper fit and sealing.
Depth:
Extensive, covering from basic maintenance to complete engine and transmission rebuilds, including detailed electrical schematics and component-level diagnostics.
Diagnostic Tools Required:
Covers use of general automotive scan tools for OBD-II, and proprietary Mercedes-Benz diagnostic tools (e.g., SDS) for more in-depth troubleshooting.
Completeness:
Comprehensive factory-level service and repair information, not a condensed aftermarket guide.
Configuration:
3.2L (3199 cc) DOHC 24-valve Inline-6
Horsepower:
217 hp @ 5,500 rpm (approx.)
Torque:
229 lb-ft @ 3,750 rpm (approx.)
Injection Type:
Bosch LH-Jetronic Fuel Injection
Fuel Type:
Premium Unleaded Gasoline (91+ octane recommended)
ECU Type:
Engine Control Unit (ECU) with integrated diagnostics
Emissions Certification:
EPA and CARB compliant for its model year.
Oil Change Interval:
Every 7,500 - 10,000 miles or annually, whichever comes first. Refer to manual for specific engine oil type and capacity.
Transmission Service:
Intervals vary, but typically around 40,000 - 60,000 miles for fluid and filter change. Early 722.6 transmissions were sensitive to fluid degradation.
Spark Plug Replacement:
Platinum spark plugs typically have a longer service life, often around 100,000 miles. Refer to manual for exact type and interval.
Engine Oil Type:
SAE 0W-30 or 5W-30 Synthetic (meeting MB 229.1 or 229.3 specifications)
Coolant Type:
Mercedes-Benz Approved Antifreeze/Coolant (e.g., G05 or G48 based, typically a blue/green silicate-free type)
Power Steering Fluid:
ATF (Automatic Transmission Fluid) or MB Spec 236.3
Cooling System:
Plastic components in the cooling system (e.g., coolant reservoir, thermostat housing) can become brittle and crack.
Window Regulators:
Plastic clips for power window regulators are prone to breaking.
Mass Air Flow Sensor:
Can become dirty, leading to rough idling and poor performance.
Biodegradable Wiring Harness:
Early W210s had wiring harnesses with insulation that could degrade over time, particularly the insulation around the engine. This manual would detail inspection and repair procedures.
