Mercedes-Benz Mercedes CLK 2002-2009 2.6L V6 Engine Specifications
Explore detailed 2.6L V6 engine specifications for the 2002-2009 Mercedes CLK. Learn about horsepower, torque, fuel system, and more for maintenance, repairs, and upgrades.
Overview Specifications
This document provides detailed technical specifications and information about the 2.6L V6 engine used in the 2002-2009 Mercedes-Benz CLK models. It is designed to assist enthusiasts, mechanics, and owners in understanding the engine's features, performance, and maintenance requirements. Use the search and navigation tools to quickly locate specific details or browse through the sections for comprehensive insights.
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Key Specifications
Horsepower
168 hp
Torque
177 lb-ft
Displacement
2.6L
Fuel Type
Premium unleaded
Combined MPG
21 mpg
Available Specifications
Engine Performance
This section covers the performance characteristics of the 2.6L V6 engine, including horsepower, torque, and acceleration metrics. It also includes details about fuel efficiency and emissions.
Engine Performance
This section covers the performance characteristics of the 2.6L V6 engine, including horsepower, torque, and acceleration metrics. It also includes details about fuel efficiency and emissions.
Power and Torque
- Horsepower: 168 hp @ 5,500 rpm
- Torque: 177 lb-ft @ 3,500 rpm
- Compression ratio: 10.0:1
- Redline: 6,200 rpm
Fuel Efficiency
- City fuel economy: 18 mpg
- Highway fuel economy: 25 mpg
- Combined fuel economy: 21 mpg
- Fuel type: Premium unleaded
Engine Design
This section delves into the design and construction of the 2.6L V6 engine, including its configuration, materials, and key components.
Engine Design
This section delves into the design and construction of the 2.6L V6 engine, including its configuration, materials, and key components.
Configuration and Layout
- Engine type: Naturally aspirated V6
- Displacement: 2.6 liters
- Cylinder arrangement: 60-degree V-angle
- Valvetrain: SOHC, 3 valves per cylinder
Materials and Construction
- Block material: Cast iron
- Cylinder head material: Aluminum
- Crankshaft: Forged steel
- Pistons: Aluminum alloy
Maintenance and Reliability
This section provides information on maintenance schedules, common issues, and tips for ensuring the longevity of the 2.6L V6 engine.
Maintenance and Reliability
This section provides information on maintenance schedules, common issues, and tips for ensuring the longevity of the 2.6L V6 engine.
Maintenance Schedule
- Oil change interval: Every 10,000 miles
- Spark plug replacement: Every 60,000 miles
- Timing belt replacement: Not applicable (timing chain)
- Coolant flush: Every 50,000 miles
Common Issues
- Oil leaks from valve cover gaskets
- Ignition coil failures
- Carbon buildup on intake valves
- Cooling system leaks
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Engine Specifications
Overview
- Type
- V6
- Configuration
- 60-degree
- Displacement
- 2.6 liters
- Aspiration
- Naturally aspirated
- Fuel System
- Sequential multi-port fuel injection
- Location
- Front longitudinal
Dimensions
- Length
- 22.8 inches (579 mm)
- Width
- 27.6 inches (701 mm)
- Height
- 21.3 inches (541 mm)
- Weight
- 385 lbs (175 kg)
- Bore
- 3.46 inches (88 mm)
- Stroke
- 3.57 inches (90.7 mm)
- Compression Ratio
- 10.5:1
- Oil Capacity
- 6.3 quarts (6.0 liters)
Materials
- Block
- Aluminum alloy
- Cylinder Head
- Aluminum alloy
- Pistons
- Forged aluminum
- Crankshaft
- Forged steel
- Valve Springs
- High-strength steel
Features
- Performance
-
- 168 horsepower at 5,500 rpm
- 177 lb-ft torque at 4,500 rpm
- Electronically controlled throttle
- Variable intake manifold
- Efficiency
-
- Low friction design
- Optimized combustion chamber
- Lightweight components
- Thermal management system
- Technology
-
- Double overhead camshaft (DOHC)
- Four valves per cylinder
- Electronic ignition system
- Integrated engine control module
- Durability
-
- Hardened valve seats
- Wear-resistant coatings
- High-tension piston rings
- Corrosion-resistant materials
- Emissions
-
- Catalytic converter
- Exhaust gas recirculation (EGR)
- Oxygen sensors
- Evaporative emission control
Safety Features
- Engine Protection
-
- Overheat protection
- Low oil pressure warning
- Rev limiter
- Fail Safes
-
- Redundant sensors
- Backup fuel pump circuit
- Emergency limp mode
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Balanced rotating assembly
- Hydraulic engine mounts
- Smooth Operation
-
- Precision-machined components
- Dual-mass flywheel
- Harmonic balancer
Accessories
- Cooling System
-
- High-capacity radiator
- Electric cooling fan
- Thermostat with bypass
- Ignition System
-
- Platinum spark plugs
- High-energy ignition coils
- Distributorless ignition
- Fuel System
-
- High-pressure fuel pump
- Fuel rail with injectors
- Fuel pressure regulator
Maintenance
- Service interval
- 10,000 miles or 12 months
- Service Items
-
- Oil and filter change
- Spark plug inspection
- Air filter replacement
- Timing belt inspection
- Coolant flush
- Maintenance Notes
- Use only Mercedes-Benz approved fluids and parts
Warranty
- Basic Warranty
- Miles: 50,000Years: 4Coverage: Bumper to bumper
- Powertrain Warranty
- Miles: 100,000Years: 7Coverage: Engine and transmission
- Corrosion Warranty
- Miles: UnlimitedYears: 12Coverage: Perforation only
- Emissions Warranty
- Miles: 80,000Years: 8Coverage: Federal emissions components
Production Details
- Manufacturer
- Mercedes-Benz
- Manufacturing Process
-
- Casting
- Machining
- Assembly
- Testing
- Quality Control
- Dimensional inspection: Laser scanningPerformance Testing: Dyno testingLeak Testing: Pressure and vacuum
- Sustainability Practices
-
- Recycled materials
- Energy-efficient manufacturing
- Waste reduction programs
- Production Metrics
- Units Per Day: 500Defect Rate: 0.05%Production Yield: 99.5%
Service Information for 2.6l v6 engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Inspect spark plugs
- Check air filter
- Inspect belts and hoses
- Check coolant level
Use Mercedes-Benz approved oil and filter
- Replace air filter
- Inspect fuel system
- Check ignition system
- Inspect exhaust system
- Check engine mounts
Special attention to fuel injectors
- Replace timing belt
- Flush cooling system
- Replace spark plugs
- Inspect valve clearance
- Check compression
Critical to replace timing belt at this interval
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 2.6L V6 engine compatible with other Mercedes models?
Is the 2.6L V6 engine compatible with other Mercedes models?
The 2.6L V6 engine, specifically the M112 E26, was primarily used in the 2002-2009 Mercedes CLK models. While it shares similarities with other M112 engines, compatibility with other models depends on factors like mounting points, ECU configurations, and transmission interfaces. Always verify with a Mercedes technical guide or dealership before attempting cross-model installations.
Q2 What are the maintenance requirements for the 2.6L V6 engine?
What are the maintenance requirements for the 2.6L V6 engine?
The 2.6L V6 engine requires regular maintenance, including oil changes every 7,500-10,000 miles, spark plug replacement every 60,000 miles, and timing belt inspection every 90,000 miles. Additionally, coolant and transmission fluid should be checked and replaced as per the manufacturer's schedule. Regular inspections of the ignition system and air filters are also recommended to ensure optimal performance.
Q3 How do I replace the 2.6L V6 engine in a Mercedes CLK?
How do I replace the 2.6L V6 engine in a Mercedes CLK?
Replacing the 2.6L V6 engine involves disconnecting the battery, draining fluids, and removing components like the intake manifold, exhaust system, and wiring harness. Use an engine hoist to lift the engine out of the bay. Installation requires aligning the new engine with the transmission and reconnecting all components. Torque all bolts to factory specifications and refill fluids. A detailed service manual is recommended for this complex procedure.
Q4 What are common troubleshooting steps for the 2.6L V6 engine?
What are common troubleshooting steps for the 2.6L V6 engine?
Common issues include rough idling, misfires, and oil leaks. Start by checking the ignition system, including spark plugs and coils. Inspect the fuel injectors and air intake for blockages. Use an OBD-II scanner to identify error codes. For oil leaks, inspect the valve cover gaskets and oil pan seals. Regular diagnostics and timely repairs can prevent major engine problems.
Q5 How can I optimize the performance of the 2.6L V6 engine?
How can I optimize the performance of the 2.6L V6 engine?
To optimize performance, use high-quality synthetic oil and replace air filters regularly. Consider upgrading the exhaust system and air intake for better airflow. Ensure the engine is properly tuned and the throttle body is clean. Regular maintenance, such as timely spark plug replacement and fuel system cleaning, also contributes to improved performance and fuel efficiency.
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 CLK 2002-2009 Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and troubleshooting for the 2.6L V6 engine and other CLK components.
Technical Service Bulletin for M112 Engine Updates
Coming SoonDetails updates and fixes for the M112 engine series, including the 2.6L V6, issued by Mercedes-Benz.
Mercedes CLK Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts compatible with the 2002-2009 CLK models, including the 2.6L V6 engine.
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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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