Mercedes-Benz Mercedes M-Class 2011-2015 3.5L V6 Engine Specifications
Explore the detailed 3.5L V6 engine specifications for the 2011-2015 Mercedes M-Class. Learn about horsepower, torque, fuel systems, and more for maintenance, repair, and upgrades.
Overview Specifications
This document provides detailed technical specifications and information about the 3.5L V6 engine used in the 2011-2015 Mercedes-Benz M-Class. It is designed to assist enthusiasts, mechanics, and owners in understanding the engine's features, performance, and maintenance requirements. Use the search and navigation instructions to quickly find the information you need. The document is divided into sections covering key aspects of the engine, with subsections offering in-depth details.
How to Use
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Key Specifications
Displacement
3.5L
Horsepower
302 hp
Torque
273 lb-ft
Fuel Efficiency
17/23 mpg
Compression Ratio
11.7:1
Available Specifications
Engine Performance
This section covers the performance characteristics of the 3.5L V6 engine, including horsepower, torque, and acceleration. It also discusses the engine's responsiveness and how it contributes to the overall driving experience of the Mercedes-Benz M-Class.
Engine Performance
This section covers the performance characteristics of the 3.5L V6 engine, including horsepower, torque, and acceleration. It also discusses the engine's responsiveness and how it contributes to the overall driving experience of the Mercedes-Benz M-Class.
Power Output
- Horsepower: 302 hp @ 6500 rpm
- Torque: 273 lb-ft @ 3500 rpm
- Acceleration (0-60 mph): 6.5 seconds
- Top speed: 130 mph (electronically limited)
- Redline: 7000 rpm
- Fuel efficiency: 17 mpg city, 23 mpg highway
Performance Features
- Direct fuel injection for improved efficiency
- Variable valve timing for enhanced power delivery
- Lightweight aluminum block for reduced weight
- Dual overhead camshafts for precise valve control
Engine Design
This section delves into the design and engineering of the 3.5L V6 engine, highlighting its construction, materials, and innovative technologies that contribute to its performance and durability.
Engine Design
This section delves into the design and engineering of the 3.5L V6 engine, highlighting its construction, materials, and innovative technologies that contribute to its performance and durability.
Construction
- Aluminum engine block for weight reduction
- Forged steel crankshaft for increased strength
- High-flow cylinder heads for improved airflow
- Integrated oil cooler for thermal management
Technologies
- ECO Start/Stop system for fuel savings
- Variable intake manifold for optimized airflow
- Low-friction piston rings for improved efficiency
- Electronic throttle control for precise power delivery
Maintenance and Reliability
This section provides information on the maintenance requirements and reliability of the 3.5L V6 engine. It includes recommended service intervals, common issues, and tips for ensuring long-term performance.
Maintenance and Reliability
This section provides information on the maintenance requirements and reliability of the 3.5L V6 engine. It includes recommended service intervals, common issues, and tips for ensuring long-term performance.
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 100,000 miles
Common Issues
- Carbon buildup on intake valves due to direct injection
- Oil leaks from valve cover gaskets
- Timing chain wear over time
- Thermostat failure leading to overheating
Search Specifications
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Engine Specifications
Overview
- Type
- V6 gasoline engine
- Configuration
- 60-degree V6
- Displacement
- 3.5 liters (3498 cc)
- Compression Ratio
- 12.0:1
- Fuel System
- Direct injection
- Location
- Front longitudinal
Dimensions
- Length
- 28.5 in (724 mm)
- Width
- 24.6 in (625 mm)
- Height
- 27.2 in (691 mm)
- Weight
- 369 lbs (167 kg)
- Cylinder Bore
- 3.7 in (94 mm)
- Piston Stroke
- 3.39 in (86 mm)
- Oil Capacity
- 7.4 quarts (7.0 liters)
Materials
- Engine Block
- Aluminum alloy
- Cylinder Head
- Aluminum alloy
- Pistons
- Forged aluminum
- Connecting Rods
- Forged steel
- Crankshaft
- Forged steel
Features
- Performance
-
- 302 hp @ 6500 rpm
- 273 lb-ft torque @ 3500 rpm
- 7000 rpm redline
- 0-60 mph in 6.5 seconds
- Efficiency
-
- Start-stop technology
- Variable valve timing
- Thermal management system
- Low friction design
- Technology
-
- Direct gasoline injection
- ECU-controlled variable intake manifold
- Electronic throttle control
- Adaptive engine mounting
- Cooling
-
- Dual-mode water pump
- Electric cooling fan
- High-capacity radiator
- Oil cooler
Safety Features
- Engine Protection
-
- Knock sensor system
- Overheat protection
- Oil pressure monitoring
- Emissions Control
-
- Catalytic converters
- O2 sensors
- EVAP system
- Fail Safes
-
- Limp-home mode
- Engine shutdown protection
- Fuel cutoff at redline
Comfort Features
- Noise Reduction
-
- Acoustic engine cover
- Hydraulic engine mounts
- Balanced crankshaft
- Vibration Control
-
- Counter-rotating balance shafts
- Active engine mounts
- Dual-mass flywheel
Accessories
- intake System
-
- High-flow air filter
- Variable intake manifold
- Acoustic intake resonators
- Exhaust System
-
- Stainless steel headers
- Dual exhaust pipes
- Active exhaust valves
- Ignition System
-
- Direct ignition system
- Platinum spark plugs
- Individual coil packs
Maintenance
- Service interval
- 10,000 miles or 12 months
- Service Items
-
- Oil and filter change
- Spark plug replacement
- Air filter inspection
- Belt tension check
- Coolant level check
- Maintenance Notes
-
- Use only Mercedes-Benz approved oil
- Requires premium unleaded fuel
- Regular throttle body cleaning recommended
Warranty
- Basic
- 4 years/50,000 miles
- Powertrain
- 5 years/60,000 miles
- Emission
- 8 years/80,000 miles
- Corrosion
- 12 years/unlimited miles
- Warranty Terms
- Transferable to subsequent owners
Production Details
- Manufacturer
- Mercedes-Benz
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser-guided alignment
- Computerized testing
- Quality Control
- Testing: Cold start testing, Dyno testing, Leak testingTolerances: ±0.0005 ininspection Points: 150+
- Sustainability
-
- Recycled aluminum content
- Low-emission manufacturing
- Energy-efficient production
- Production Metrics
- Daily Output: 500 unitsAssembly Time: 8.5 hoursRejection Rate: 0.1%
Service Information for 3.5l v6 engine Service
Maintenance and service requirements specific to this engine
- Oil and filter change
- Air filter inspection
- Spark plug inspection
- Belt tension check
- Coolant level check
- Throttle body cleaning
Use only Mercedes-Benz approved 5W-40 synthetic oil
- Spark plug replacement
- Fuel filter replacement
- PCV valve inspection
- Engine mount inspection
- Exhaust system inspection
Complete engine diagnostic recommended
- Timing chain inspection
- Water pump replacement
- Thermostat replacement
- Complete engine decarbonization
- Compression test
Major service requires specialized tools and equipment
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 3.5L V6 engine compatible with other Mercedes-Benz models?
Is the 3.5L V6 engine compatible with other Mercedes-Benz models?
The 3.5L V6 engine, found in the 2011-2015 Mercedes M-Class, is primarily designed for this specific model. While it shares some components with other Mercedes-Benz engines, direct compatibility with other models is limited. Always verify engine codes and consult the manufacturer or a certified technician before attempting cross-model installations.
Q2 What is the recommended maintenance schedule for the 3.5L V6 engine?
What is the recommended maintenance schedule for the 3.5L V6 engine?
The 3.5L V6 engine requires regular maintenance to ensure optimal performance. Key tasks include oil changes every 10,000 miles, air filter replacement every 20,000 miles, and spark plug replacement every 60,000 miles. Additionally, inspect the timing belt and coolant system every 40,000 miles and perform a comprehensive engine diagnostic annually.
Q3 How do I replace the timing belt on the 3.5L V6 engine?
How do I replace the timing belt on the 3.5L V6 engine?
Replacing the timing belt involves several steps: First, disconnect the battery and remove the engine cover. Loosen the serpentine belt and remove components blocking access to the timing cover. Align the timing marks, remove the old belt, and install the new one, ensuring proper tension. Reassemble components and verify timing alignment before starting the engine.
Q4 What should I do if my 3.5L V6 engine is misfiring?
What should I do if my 3.5L V6 engine is misfiring?
Misfiring can result from faulty spark plugs, ignition coils, or fuel injectors. Start by using an OBD-II scanner to identify the specific cylinder causing the issue. Inspect and replace damaged components as needed. If the problem persists, check the fuel pressure and air intake system for blockages or leaks.
Q5 How can I optimize the performance of my 3.5L V6 engine?
How can I optimize the performance of my 3.5L V6 engine?
To enhance performance, use high-quality synthetic oil and premium fuel. Upgrade the air intake and exhaust systems for improved airflow. Regularly clean the throttle body and fuel injectors. Consider a professional ECU remap to optimize fuel delivery and ignition timing. Ensure all maintenance tasks are performed on schedule.
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 M-Class 3.5L V6 Engine Service Manual
Coming SoonThis manual provides detailed instructions for servicing and repairing the 3.5L V6 engine, including torque specifications, diagnostic procedures, and maintenance schedules.
Technical Service Bulletin: 3.5L V6 Engine Performance Update
Coming SoonThis bulletin outlines software updates and modifications to improve engine performance and address common issues in the 2011-2015 M-Class models.
3.5L V6 Engine Parts and Accessories Catalog
Coming SoonA comprehensive catalog listing all OEM and aftermarket parts and accessories compatible with the 3.5L V6 engine, including part numbers and installation tips.
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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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