Mercedes-Benz Mercedes SLK 2004-2010 5.5L V8 Engine Specifications
Discover detailed technical specifications for the 5.5L V8 engine in the 2004-2010 Mercedes SLK. Includes performance data, maintenance tips, and compatibility information 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 SLK. It is designed to assist enthusiasts, technicians, and engineers in understanding the engine's design, performance, and maintenance. The content is organized into sections covering engine design, performance, and maintenance. Use the search and navigation instructions to quickly find the information you need.
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Key Specifications
Displacement
5.5L
Horsepower
360 hp
Torque
376 lb-ft
Fuel Economy
15/22 mpg
0-60 mph
4.9 seconds
Available Specifications
Engine Design
The 5.5L V8 engine in the 2004-2010 Mercedes SLK is known for its robust design and advanced engineering. This section covers the key components and architecture of the engine, including the cylinder block, cylinder heads, and valvetrain.
Engine Design
The 5.5L V8 engine in the 2004-2010 Mercedes SLK is known for its robust design and advanced engineering. This section covers the key components and architecture of the engine, including the cylinder block, cylinder heads, and valvetrain.
Cylinder Block and Pistons
- Aluminum alloy construction for reduced weight
- 90-degree V8 configuration
- Bore and stroke: 98.0 mm x 90.5 mm
- Forged steel crankshaft for durability
- High-strength connecting rods
- Low-friction piston rings
Cylinder Heads and Valvetrain
- Dual overhead camshafts (DOHC)
- Four valves per cylinder
- Variable valve timing (VVT) for optimized performance
- Hydraulic lifters for reduced maintenance
- High-flow intake and exhaust ports
Performance
The 5.5L V8 engine delivers impressive performance with a focus on power, torque, and efficiency. This section details the engine's output, fuel system, and cooling mechanisms.
Performance
The 5.5L V8 engine delivers impressive performance with a focus on power, torque, and efficiency. This section details the engine's output, fuel system, and cooling mechanisms.
Power and Torque
- Maximum power output: 360 hp at 5750 rpm
- Peak torque: 376 lb-ft at 4000 rpm
- 0-60 mph acceleration: 4.9 seconds
- Top speed: 155 mph (electronically limited)
Fuel System and Efficiency
- Sequential multi-port fuel injection
- Premium unleaded fuel requirement
- Fuel economy: 15 mpg city / 22 mpg highway
- Electronic throttle control for precise response
Maintenance
Proper maintenance is essential for the longevity and performance of the 5.5L V8 engine. This section provides guidelines for routine maintenance, common issues, and recommended service intervals.
Maintenance
Proper maintenance is essential for the longevity and performance of the 5.5L V8 engine. This section provides guidelines for routine maintenance, common issues, and recommended service intervals.
Routine Maintenance
- Oil change interval: Every 10,000 miles
- Recommended oil type: 5W-40 synthetic
- Spark plug replacement: Every 60,000 miles
- Air filter replacement: Every 30,000 miles
Common Issues and Solutions
- Engine misfires due to faulty ignition coils
- Oil leaks from valve cover gaskets
- Coolant system leaks
- Regular inspection of belts and hoses recommended
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Engine Specifications
Overview
- Type
- V8 gasoline engine
- Configuration
- 90-degree V8
- Displacement
- 5.5 liters (5461 cc)
- Location
- Front longitudinal
- Material
- Aluminum block and heads
- Aspiration
- Naturally aspirated
Dimensions
- Length
- 27.5 inches (699 mm)
- Width
- 29.1 inches (740 mm)
- Height
- 25.6 inches (650 mm)
- Weight
- 440 lbs (200 kg)
- Bore
- 3.82 inches (97 mm)
- Stroke
- 3.58 inches (91 mm)
- Compression Ratio
- 10.7:1
- Oil Capacity
- 8.5 quarts (8 liters)
Materials
- Block
- Aluminum alloy
- Cylinder Heads
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valves
- Titanium intake, steel exhaust
Features
- Fuel System
-
- Sequential multiport fuel injection
- Electronic throttle control
- High-pressure fuel pump
- Ignition System
-
- Direct ignition system
- Individual coil-on-plug
- Knock control system
- Cooling System
-
- High-capacity water pump
- Dual thermostats
- Aluminum radiator
- Lubrication System
-
- Variable displacement oil pump
- Oil cooler
- Dry sump option
- Emissions Control
-
- Dual catalytic converters
- Exhaust gas recirculation
- EVAP system
- Performance Features
-
- Variable valve timing
- High-flow intake manifold
- Low-friction piston rings
Safety Features
- Engine Protection
-
- Oil pressure warning system
- Coolant temperature sensor
- Over-rev protection
- Fire Prevention
-
- Fuel cut-off in crash
- Heat shielding around exhaust
- Electronics Safety
-
- Fail-safe engine mode
- Short-circuit protection
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Hydraulic engine mounts
- Tuned intake silencing
- Vibration Control
-
- Dual-mass flywheel
- Counter-rotating balancer shafts
- Climate Control
-
- Engine-driven A/C compressor
- Integrated coolant heater
Accessories
- Belt Driven
-
- Accessory drive belt
- Tensioner pulley
- Idler pulley
- Electrical
-
- High-output alternator
- Starter motor
- Battery management system
- Miscellaneous
-
- Engine cover
- Decorative valve covers
- Oil dipstick
Maintenance
- Service interval
- Every 10,000 miles or 12 months
- Service Items
-
- Oil and filter change
- Spark plug replacement
- Air filter inspection
- Timing chain inspection
- Coolant system check
- Belt and hose inspection
- Maintenance Notes
- Use only Mercedes-Benz approved fluids and parts
Warranty
- Basic
- Years: 4Miles: 50000Coverage: Bumper-to-bumper
- Powertrain
- Years: 5Miles: 60000Coverage: Engine and transmission
- Corrosion
- Years: 7Miles: UnlimitedCoverage: Perforation only
- Emissions
- Years: 8Miles: 80000Coverage: Emission control components
Production Details
- Manufacturer
- Mercedes-Benz
- Manufacturing Process
-
- Precision casting
- CNC machining
- Robotic assembly
- Quality Control
- Dimensional Checks: Laser measurementPerformance Testing: Dynamometer testingLeak Testing: Pressurized systems
- Sustainability Practices
-
- Recycled aluminum usage
- Energy-efficient manufacturing
- Waste minimization
- Production Metrics
- Units Per Day: 150Defect Rate: <0.1%Assembly Time: 6 hours per engine
Service Information for 5.5l v8 engine Service
Maintenance and service requirements specific to this component
- Change engine oil and filter
- Inspect air filter
- Check coolant level and quality
- Inspect drive belts
- Check engine mounts
Use only Mercedes-Benz approved 5W-40 synthetic oil
- Replace spark plugs
- Inspect ignition coils
- Check valve clearance
- Inspect timing chain
- Replace air filter
Special tools required for valve adjustment
- Replace timing chain and guides
- Replace water pump
- Flush cooling system
- Replace accessory drive belt
- Inspect and clean fuel injectors
Requires engine front cover removal for timing chain 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, coded M273, is primarily designed for the 2004-2010 Mercedes SLK 55 AMG. While it shares some components with other Mercedes models like the E-Class and CLS-Class, direct compatibility depends on specific engine mounts, wiring, and ECU configurations. Always verify cross-compatibility with official Mercedes documentation or a certified technician before attempting any swaps or modifications.
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 miles with synthetic 5W-40 oil, replacing the air filter every 15,000 miles, and inspecting spark plugs every 30,000 miles. Additionally, the timing chain and tensioner should be checked periodically to avoid wear. Adhering to the manufacturer’s maintenance schedule is crucial for longevity.
Q3 How do I replace the 5.5L V8 engine in a 2004-2010 Mercedes SLK?
How do I replace the 5.5L V8 engine in a 2004-2010 Mercedes SLK?
Replacing the 5.5L V8 engine involves several steps: disconnect the battery, drain fluids, and remove components like the air intake, exhaust system, and wiring harness. Use an engine hoist to carefully lift the old engine out. Install the new engine by reversing the removal process, ensuring all connections are secure. Torque bolts to manufacturer specifications and refill fluids. Professional assistance is recommended for this complex procedure.
Q4 What should I do if my 5.5L V8 engine is misfiring?
What should I do if my 5.5L V8 engine is misfiring?
Misfiring in the 5.5L V8 engine can result from faulty spark plugs, ignition coils, or fuel injectors. Start by scanning for error codes using an OBD-II scanner. Inspect and replace spark plugs and ignition coils if necessary. Check fuel injectors for clogs or leaks. If the issue persists, inspect the engine’s compression and timing chain. Regular diagnostics and maintenance can prevent misfires.
Q5 How can I optimize the performance of my 5.5L V8 engine?
How can I optimize the performance of my 5.5L V8 engine?
To optimize the 5.5L V8 engine’s performance, use high-quality synthetic oil and premium fuel. Consider upgrading the air intake and exhaust systems for better airflow. A professional ECU tune can enhance power and throttle response. Regularly clean the fuel injectors and replace worn components. Maintaining proper tire pressure and alignment also contributes to overall vehicle performance.
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 SLK 55 AMG Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and technical specifications for the 2004-2010 SLK 55 AMG with the 5.5L V8 engine.
Technical Service Bulletin: Timing Chain Tensioner
Coming SoonBulletin addressing common timing chain tensioner issues in the M273 5.5L V8 engine, including diagnostic and repair procedures.
Mercedes SLK 55 AMG Parts Catalog
Coming SoonDetailed catalog of OEM and aftermarket parts for the 2004-2010 SLK 55 AMG, including engine components and accessories.
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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.
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- If you're unsure about any procedure, consult a qualified professional mechanic.
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