Mercedes-Benz Mercedes CLS 2004-2010 5.5L V8 Engine Specifications
Explore the detailed technical specifications of the 5.5L V8 engine in the 2004-2010 Mercedes CLS. This guide covers performance metrics, maintenance tips, and compatibility for repairs and upgrades.
Overview Specifications
This document provides detailed specifications and technical information about the 5.5L V8 engine used in the 2004-2010 Mercedes-Benz CLS. It is designed for enthusiasts, mechanics, and engineers seeking comprehensive insights into the engine's design, performance, and maintenance. Use the search and navigation instructions to quickly locate specific details or browse through the sections for a thorough understanding of the engine's features and capabilities.
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Key Specifications
Displacement
5.5L
Horsepower
388 HP
Torque
391 lb-ft
Transmission
7-speed automatic
Fuel Economy
16/23 mpg
Available Specifications
Engine Design and Architecture
This section covers the fundamental design and architecture of the 5.5L V8 engine, including its configuration, materials, and construction. Learn about the engine's layout, cylinder arrangement, and key design features that contribute to its performance and durability.
Engine Design and Architecture
This section covers the fundamental design and architecture of the 5.5L V8 engine, including its configuration, materials, and construction. Learn about the engine's layout, cylinder arrangement, and key design features that contribute to its performance and durability.
Cylinder Configuration
- 90-degree V8 configuration
- Aluminum alloy block and heads
- DOHC (Dual Overhead Camshaft) design
- 32-valve setup (4 valves per cylinder)
- Forged steel crankshaft
- High-strength connecting rods
Materials and Construction
- Lightweight aluminum construction
- Plasma-coated cylinder liners
- High-strength forged pistons
- Advanced thermal management system
- Integrated oil cooler
- Precision-machined components
Performance Specifications
Explore the performance capabilities of the 5.5L V8 engine, including its power output, torque, and acceleration. This section provides detailed metrics and insights into how the engine delivers its impressive performance.
Performance Specifications
Explore the performance capabilities of the 5.5L V8 engine, including its power output, torque, and acceleration. This section provides detailed metrics and insights into how the engine delivers its impressive performance.
Power and Torque
- 388 horsepower at 6,000 RPM
- 391 lb-ft of torque at 2,800 RPM
- 7-speed automatic transmission
- Top speed of 155 mph (electronically limited)
- 0-60 mph in 5.4 seconds
- Responsive throttle mapping
Fuel Efficiency
- Direct fuel injection system
- Average fuel economy of 16 mpg city / 23 mpg highway
- Eco mode for improved efficiency
- Low-friction components
- Optimized combustion process
- Compliance with Euro 4 emissions standards
Maintenance and Reliability
This section provides essential information on maintaining the 5.5L V8 engine, including recommended service intervals, common maintenance tasks, and tips for ensuring long-term reliability. Learn how to keep the engine running smoothly and efficiently.
Maintenance and Reliability
This section provides essential information on maintaining the 5.5L V8 engine, including recommended service intervals, common maintenance tasks, and tips for ensuring long-term reliability. Learn how to keep the engine running smoothly and efficiently.
Service Intervals
- Oil change every 10,000 miles or 12 months
- Spark plug replacement every 60,000 miles
- Air filter replacement every 30,000 miles
- Coolant flush every 50,000 miles
- Timing chain inspection every 100,000 miles
- Regular diagnostic checks
Common Maintenance Tasks
- Checking and topping off engine oil
- Inspecting and replacing belts and hoses
- Cleaning or replacing fuel injectors
- Monitoring engine temperature and pressure
- Ensuring proper lubrication of moving parts
- Addressing any warning lights promptly
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Engine Specifications
Overview
- Type
- Naturally aspirated V8
- Configuration
- 90-degree V8
- Displacement
- 5.5 liters (5461 cc)
- Fuel Type
- Premium unleaded gasoline
- Location
- Front longitudinal
- Production Years
- 2004-2010
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 30.7 inches (780 mm)
- Height
- 27.6 inches (701 mm)
- Weight
- 441 lbs (200 kg)
- Bore
- 3.86 inches (98 mm)
- Stroke
- 3.58 inches (90.9 mm)
- Compression Ratio
- 10.7:1
- Oil Capacity
- 8.5 quarts (8 liters)
Materials
- Engine Block
- Aluminum alloy
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valve Train
- DOHC with dual VVT
Features
- Performance
-
- 388 horsepower at 6000 rpm
- 391 lb-ft torque at 2800-4800 rpm
- 0-60 mph in 5.4 seconds
- Top speed electronically limited to 155 mph
- Fuel System
-
- Sequential multi-port fuel injection
- Electronic throttle control
- Variable intake manifold
- Ignition System
-
- Coil-on-plug ignition
- Direct spark ignition
- Knock control system
- Cooling System
-
- Dual electric cooling fans
- High-capacity radiator
- Thermostatically controlled coolant flow
- Emissions
-
- LEV-II compliant
- Dual catalytic converters
- Secondary air injection
Safety Features
- Engine Protection
-
- Oil pressure warning system
- Coolant temperature sensor
- Low oil level sensor
- Electronic Controls
-
- Traction control system (TCS)
- Electronic stability program (ESP)
- Adaptive engine management
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Hydraulic engine mounts
- Sound-deadening materials
- Vibration Control
-
- Balanced crankshaft
- Dual-mass flywheel
- Active engine mounts
Accessories
- Engine Bay
-
- Polished aluminum intake manifold
- Chrome-plated valve covers
- Stainless steel exhaust headers
- Cooling System
-
- High-performance radiator
- Auxiliary transmission cooler
- Power steering cooler
- Electrical System
-
- High-output alternator
- Maintenance-free battery
- Integrated power distribution module
Maintenance
- Service interval
- 10,000 miles or 12 months
- Service Items
-
- Oil and filter change
- Air filter replacement
- Spark plug replacement
- Timing chain inspection
- Coolant flush
- Belt tensioner check
- Maintenance Notes
- Use only Mercedes-Benz approved fluids and filters
Warranty
- Basic
- Miles: 50,000Years: 4Coverage: Bumper-to-bumper
- Powertrain
- Miles: 100,000Years: 7Coverage: Engine and transmission
- Corrosion
- Miles: UnlimitedYears: 10Coverage: Perforation only
- Roadside Assistance
- Miles: UnlimitedYears: 4Coverage: 24/7 emergency services
Production Details
- Manufacturer
- Mercedes-Benz
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly line
- Laser-guided quality control
- Quality Control
- Engine Testing: 100% dyno testingLeak Testing: Pressure and vacuum testsFinal Inspection: Visual and electronic verification
- Sustainability Practices
-
- Recycled aluminum usage
- Low-emission painting process
- Waste heat recovery system
- Production Metrics
- Units Per Day: 150Defect Rate: <0.1%Energy Efficiency: 85%
Service Information for 5.5l v8 engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Air filter inspection
- Spark plug inspection
- Coolant level check
- Belt tension check
Use only Mercedes-Benz approved 5W-40 synthetic oil
- Air filter replacement
- Fuel filter replacement
- Spark plug replacement
- Coolant flush
- Throttle body cleaning
Requires special tools for throttle body service
- Timing chain inspection
- Water pump replacement
- Serpentine belt replacement
- Engine mount inspection
- Complete engine diagnostic
Major service interval - recommend dealer service
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 5.5L V8 engine compatible with other Mercedes models from 2004-2010?
Is the 5.5L V8 engine compatible with other Mercedes models from 2004-2010?
The 5.5L V8 engine, also known as the M273, is primarily designed for the 2004-2010 Mercedes CLS-Class. However, it is also compatible with other models like the E-Class, S-Class, and ML-Class within the same production years. Ensure compatibility by verifying the engine code and consulting your vehicle's technical specifications or a Mercedes dealership for confirmation.
Q2 What are the maintenance requirements for the 5.5L V8 engine?
What are the maintenance requirements for the 5.5L V8 engine?
The 5.5L V8 engine requires regular maintenance to ensure optimal performance. Key tasks include oil changes every 7,500-10,000 miles, spark plug replacement every 60,000 miles, and air filter replacement every 30,000 miles. Additionally, inspect the timing chain and tensioners periodically, as these are known wear points. Adhering to Mercedes-Benz's recommended service schedule is crucial for longevity.
Q3 How do I replace the 5.5L V8 engine in a 2004-2010 Mercedes CLS?
How do I replace the 5.5L V8 engine in a 2004-2010 Mercedes CLS?
Replacing the 5.5L V8 engine involves several steps: disconnect the battery, drain fluids, and remove components like the intake manifold, exhaust system, and wiring harness. Use an engine hoist to lift the engine out. Installation is the reverse process, ensuring all connections are secure. Torque bolts to manufacturer specifications and refill fluids. Professional assistance is recommended for this complex procedure.
Q4 What are common troubleshooting steps for the 5.5L V8 engine?
What are common troubleshooting steps for the 5.5L V8 engine?
Common issues with the 5.5L V8 engine include rough idling, misfires, and oil leaks. Start by scanning for error codes using an OBD-II scanner. Check spark plugs, ignition coils, and fuel injectors for faults. Inspect the timing chain and tensioners for wear. If oil leaks are present, examine the valve covers and oil seals. Addressing these issues promptly can prevent further damage.
Q5 How can I optimize the performance of the 5.5L V8 engine?
How can I optimize the performance of the 5.5L V8 engine?
To optimize performance, use high-quality synthetic oil and premium fuel. Upgrade the air intake and exhaust systems for better airflow. Consider a performance tune to enhance horsepower and torque. Regularly clean the throttle body and replace worn components like spark plugs and filters. Proper maintenance and performance upgrades can significantly improve engine efficiency and power output.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Mercedes-Benz CLS-Class Service Manual (2004-2010)
Coming SoonComprehensive service manual covering maintenance, repairs, and technical specifications for the 2004-2010 Mercedes CLS-Class, including the 5.5L V8 engine.
Technical Service Bulletin: Timing Chain Tensioner Update
Coming SoonDetails a critical update for the timing chain tensioner in the 5.5L V8 engine to prevent premature wear and failure.
Mercedes-Benz Genuine Parts Catalog
Coming SoonCatalog listing genuine parts and accessories for the 2004-2010 Mercedes CLS-Class, including engine components for the 5.5L V8.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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