Market Segment:
Full-size Luxury Sedan
Primary Competitors:
BMW 7 Series, Audi A8, Lexus LS, Porsche Panamera, Jaguar XJ
Luxury Appointments:
Premium materials, advanced comfort features, sophisticated design
Advanced Technology:
State-of-the-art infotainment, driver assistance systems, sophisticated chassis control
Primary Coverage:
Service and Repair
Secondary Coverage:
Diagnostics, Troubleshooting, Maintenance
Estimated Page Count:
Comprehensive (Software-based, no fixed page count)
Type:
Official Service and Repair Manual Software
Format:
Software/Digital (likely PDF or proprietary viewer)
Engine Mechanical:
Detailed overhaul procedures, component specifications, timing, valve adjustments
Engine Management:
Fuel injection, ignition timing, emissions control, sensor diagnostics
Transmission:
Automatic transmission (722.9 '7G-TRONIC'), removal, installation, fluid service, component repair
Drivetrain:
Front and rear axle, driveshafts, differentials, lubrication
Suspension:
Active Body Control (ABC), air suspension, component replacement, calibration
Brakes:
Hydraulic system, ABS, ESP, SBC (if applicable, though less likely for 2010 S550), brake pad/rotor replacement, bleeding procedures
Steering:
Power steering system, steering column, alignment specifications
Electrical System:
Battery, charging system, starter, lighting, power distribution
Body And Chassis:
Body panel removal/installation, doors, glass, seals, structural components
HVAC:
Climate control system, refrigerant handling, component diagnosis
Infotainment:
COMAND system, navigation, audio, telematics (diagnosis and troubleshooting)
Safety Systems:
Airbag system (SRS), seatbelt pre-tensioners, sensor diagnostics
Routine Maintenance:
Oil changes, filter replacements, fluid checks, spark plug replacement
Diagnostic Troubleshooting:
Fault code interpretation, component testing, wiring diagrams
Component Replacement:
Detailed step-by-step guides for major and minor component replacement
Rebuilding Procedures:
Engine, transmission, and other major component rebuilding instructions
Calibration Procedures:
Suspension, steering angle sensor, and other system calibrations
Depth:
Comprehensive: Covers from basic fluid changes to complete engine and transmission overhauls, including advanced electrical diagnostics.
NHTSA Front Crash Test Rating:
5-Star (Driver and Passenger)
IIHS Top Safety Pick:
Yes
Active Safety Suite:
ABS, ESP (Electronic Stability Program), BAS (Brake Assist), PRE-SAFE®
Driver Assistance Systems:
Optional: DISTRONIC PLUS (Adaptive Cruise Control), PARKTRONIC (Parking Assist), LANE KEEPING ASSIST, BLIND SPOT ASSIST
Airbags:
Front, side, curtain, knee airbags
Seatbelts:
Pre-tensioners, force limiters
Infotainment System:
COMAND APS (Cockpit Management and Navigation)
Display Size:
8-inch color display
Features:
Navigation, AM/FM/HD Radio, CD/DVD player, SD card slot, USB/Aux input, Bluetooth connectivity.
Standard Driver Assistance:
PRE-SAFE® system
Optional Driver Assistance Packages:
Driver Assistance Package (DISTRONIC PLUS, BAS PLUS, PRE-SAFE® Brake), Lane Keeping Package (Lane Keeping Assist, Blind Spot Assist)
Connectivity Options:
Bluetooth for hands-free calling and audio streaming.
Headlights:
Bi-Xenon Adaptive Headlights with LED Daytime Running Lamps
Oil Change Interval:
Flexible Service System (FSS) - typically every 10,000 miles or 1 year, depending on driving conditions and oil life monitor.
Major Service Interval:
Refer to FSS for A and B service intervals, which may include spark plugs, brake fluid, and other component checks.
Engine Oil Type:
MB 229.5 (e.g., Mobil 1 0W-40, Castrol Edge 0W-40)
Engine Oil Capacity:
8.5 liters (approx.)
Coolant Type:
MB 325.0 / 326.0 (Antifreeze/Coolant concentrate)
Brake Fluid Type:
DOT 4 Plus (e.g., MB Brake Fluid A0009890807)
Common Wear Items:
Air suspension struts/lines, ABC hydraulic fluid leaks, ignition coils, catalytic converters.
Electrical Gremlins:
Can be prone to various minor electrical issues due to complex systems; often requires STAR diagnostic tool for accurate troubleshooting.
Oil Filter Part Number:
A2731840125 (example, consult dealer for VIN-specific parts)
Brand Legacy:
Mercedes-Benz has a long-standing reputation for luxury, engineering, and safety dating back to the invention of the automobile.
W221 Generation Introduction:
The W221 S-Class generation was introduced in 2005 for the 2006 model year, replacing the W220. The 2010 model year saw a mid-cycle refresh (facelift) with updated styling, technology, and powertrain revisions.
Production Location:
Sindelfingen, Germany
