Vehicle Class:
Luxury Grand Tourer Coupe
Segment:
Four-door coupe segment, blending sedan practicality with coupe styling.
Key Competitors:
BMW 6 Series Gran Coupe, Audi A7 Sportback, Porsche Panamera.
Design:
Distinctive sloping roofline and frameless doors, offering a unique visual statement.
Performance:
Emphasis on powerful engine options and refined driving dynamics.
Luxury:
Premium interior materials, advanced technology, and sophisticated comfort features.
Engine:
All aspects of the M273 V8 engine, including diagnostics, repair, and overhaul.
Transmission:
7G-TRONIC automatic transmission (722.9), including removal, installation, calibration, and fluid service.
Drivetrain:
All-wheel drive (4MATIC) system, differentials, axles, and driveshafts.
Suspension:
AIRMATIC air suspension system, multi-link front and rear suspension, components, and calibration.
Brakes:
ABS, ESP, SBC (if applicable for the model year, though likely phased out), brake system components, diagnostics, and bleeding procedures.
Steering:
Power steering system, steering column, and associated components.
Electrical System:
Comprehensive coverage of the entire electrical system, including wiring diagrams, component testing, CAN bus diagnostics, fuse boxes, relays, and lighting.
Body:
Body panels, doors, hood, trunk, interior trim, and associated hardware.
Climate Control:
Automatic climate control system, A/C system service, and component diagnostics.
Infotainment:
Audio system, navigation system (COMAND), Bluetooth connectivity, and related components.
Safety Systems:
Airbag system, seatbelt pre-tensioners, and related safety electronics.
Maintenance:
Oil changes, filter replacements, fluid top-offs, brake pad replacement, spark plug replacement, and belt inspection/replacement.
Diagnostics:
Troubleshooting guides, DTC (Diagnostic Trouble Code) interpretation, and step-by-step diagnostic procedures for all major systems.
Repair:
Detailed repair instructions for virtually all components, including engine, transmission, suspension, brakes, electrical modules, and body components.
Disassembly Reassembly:
Comprehensive step-by-step instructions for removing and reinstalling all major components and sub-assemblies.
Calibration Adjustment:
Procedures for calibrating sensors, electronic modules, and vehicle systems after component replacement or repair.
Wiring Diagrams:
Complete and detailed wiring diagrams for all electrical systems, color-coded for clarity.
Depth:
Professional-level technical information, suitable for independent repair shops and advanced DIY enthusiasts. Covers everything from basic maintenance to complete engine and transmission rebuilds.
Engine Code:
M273 (for CLS550)
Configuration:
5.5L V8, Naturally Aspirated
Bore X Stroke:
98.0 mm x 90.5 mm
Displacement:
5461 cc (5.5 Liters)
Compression Ratio:
10.7:1
Valvetrain:
SOHC (Single Overhead Camshaft) with 4 valves per cylinder, variable valve timing.
Horsepower:
382 hp @ 6000 rpm
Torque:
391 lb-ft @ 2800-4800 rpm
Fuel Delivery:
Sequential Multi-Port Fuel Injection (SFI)
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher recommended)
ECU Type:
Bosch ME 9.7 (or similar)
NHTSA Front Impact:
5-Star (likely for 2010 model year)
IIHS Side Impact:
Good (likely for 2010 model year)
Esp:
Electronic Stability Program (standard)
ABS:
Anti-lock Braking System (standard)
Adas:
Optional: DISTRONIC PLUS (adaptive cruise control), PARKTRONIC (parking assist), LANE KEEPING ASSIST, BLIND SPOT ASSIST.
Airbags:
Front airbags, side airbags, window curtain airbags.
Seatbelts:
Pre-tensioning front seatbelts with belt-force limiters, rear seatbelts.
System Name:
COMAND (Cockpit Management and Navigation)
Features:
GPS Navigation, CD/DVD player, AM/FM radio, SiriusXM Satellite Radio, Bluetooth audio streaming and hands-free calling, USB interface, auxiliary input.
Standard Features:
Driver-selectable suspension modes (Comfort/Sport), cruise control.
Optional Features:
DISTRONIC PLUS (adaptive cruise control with full braking capability), PARKTRONIC (front and rear parking sensors), LANE KEEPING ASSIST, BLIND SPOT ASSIST, rearview camera.
Bluetooth:
Integrated Bluetooth for hands-free calling and audio streaming.
Keyless Go:
Optional keyless entry and ignition system.
Oil Change Interval:
Typically every 10,000 miles or 12 months, whichever comes first (based on flexible service system, actual may vary).
Transmission Fluid Service:
Recommended every 40,000 to 60,000 miles for the 7G-TRONIC transmission. Check service manual for exact interval and procedures (e.g., for filter replacement).
Spark Plugs:
Typically around 60,000 to 100,000 miles, depending on plug type (e.g., iridium).
Engine Oil Type:
SAE 0W-40 or 5W-40, MB 229.5 approved (e.g., Mobil 1 0W-40, Castrol EDGE 5W-40).
Coolant Type:
MB 325.0 / 326.0 (Antifreeze/Coolant concentrate, blue color - e.g., Mercedes-Benz Antifreeze)
Brake Fluid Type:
DOT 4 Plus (or MB Spec 332.0)
Common Problems:
Possible issues can include: oil cooler seals leaking, SBC system (if present) issues, suspension component wear (especially with AIRMATIC), ignition coil failure, and potential transmission control module (TCM) issues.
Airmatic Suspension:
Leaks in air springs, compressor failures, or sensor issues leading to vehicle height problems.
Electrical Gremlins:
Though improved, electrical systems can still present intermittent issues, often related to sensors or module communication.
Award Categories:
While specific awards for the 2010 CLS550 model might be numerous or specific to regional publications, the CLS line generally receives recognition for its styling, luxury, and performance from automotive journalists and organizations like Car and Driver, MotorTrend, and Kelley Blue Book.
Segment Performance:
Consistently rated highly for its blend of comfort, power, and distinctive design within the luxury coupe segment.
