Mercedes-Benz Mercedes M-Class 2011-2015 Emissions & Sensors Specifications
Explore detailed specifications for the emissions sensors in the 2011-2015 Mercedes M-Class. Learn about sensor types, functions, compatibility, and troubleshooting tips for optimal emissions system performance.
Overview Specifications
This document provides detailed specifications and technical information about the emissions sensors in the 2011-2015 Mercedes M-Class. It is designed to assist technicians, engineers, and enthusiasts in understanding the sensor technology, maintenance, and troubleshooting. The content is organized into sections for easy navigation and includes a quick reference guide for key specifications. Use the search and navigation instructions to efficiently find the information you need.
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Key Specifications
O2 Sensor Operating Temperature
600-800°C
NOx Sensor Response Time
< 1 second
PM Sensor Detection Range
0-20 mg/m³
Sensor Replacement Interval
60,000-100,000 miles
Sensor Voltage Range
0.1-5.0 V
Available Specifications
Oxygen (O2) Sensors
Oxygen sensors, also known as O2 sensors, play a critical role in monitoring the air-fuel ratio in the exhaust gases. This section covers the location, function, and diagnostic procedures for the O2 sensors in the 2011-2015 Mercedes M-Class.
Oxygen (O2) Sensors
Oxygen sensors, also known as O2 sensors, play a critical role in monitoring the air-fuel ratio in the exhaust gases. This section covers the location, function, and diagnostic procedures for the O2 sensors in the 2011-2015 Mercedes M-Class.
Sensor Location and Function
- Located in the exhaust system before and after the catalytic converter
- Monitors oxygen levels in exhaust gases
- Provides feedback to the engine control unit (ECU)
- Helps optimize fuel efficiency and reduce emissions
- Typically consists of zirconia or titania elements
- Operates at high temperatures for accurate readings
Diagnostics and Maintenance
- Check for fault codes using OBD-II scanner
- Inspect wiring and connectors for damage
- Replace sensors every 60,000-100,000 miles
- Use manufacturer-recommended replacement parts
- Ensure proper installation to avoid leaks
- Test sensor response time for functionality
Nitrogen Oxide (NOx) Sensors
NOx sensors are essential for controlling nitrogen oxide emissions, particularly in diesel engines. This section provides details on the operation, troubleshooting, and replacement of NOx sensors in the Mercedes M-Class.
Nitrogen Oxide (NOx) Sensors
NOx sensors are essential for controlling nitrogen oxide emissions, particularly in diesel engines. This section provides details on the operation, troubleshooting, and replacement of NOx sensors in the Mercedes M-Class.
Sensor Operation and Calibration
- Measures NOx levels in exhaust gases
- Works in conjunction with selective catalytic reduction (SCR) systems
- Requires periodic calibration for accuracy
- Monitors exhaust temperature and pressure
- Sends data to the ECU for emission control
- Uses advanced electrochemical technology
Troubleshooting and Replacement
- Diagnose using OBD-II scanner for NOx-related codes
- Check for contamination or soot buildup
- Replace sensor if calibration fails
- Follow manufacturer guidelines for installation
- Test sensor output voltage for consistency
- Ensure proper sealing to prevent exhaust leaks
Particulate Matter (PM) Sensors
Particulate matter sensors monitor soot levels in diesel exhaust systems. This section explains their role, maintenance, and troubleshooting in the 2011-2015 Mercedes M-Class.
Particulate Matter (PM) Sensors
Particulate matter sensors monitor soot levels in diesel exhaust systems. This section explains their role, maintenance, and troubleshooting in the 2011-2015 Mercedes M-Class.
Sensor Function and Importance
- Detects soot particles in diesel exhaust
- Supports diesel particulate filter (DPF) regeneration
- Ensures compliance with emission standards
- Provides real-time data to the ECU
- Uses advanced optical or electrical detection methods
- Critical for maintaining engine performance
Maintenance and Troubleshooting
- Inspect for soot buildup and clean regularly
- Check wiring and connections for integrity
- Replace sensor if readings are inconsistent
- Use manufacturer-recommended cleaning agents
- Test sensor response during DPF regeneration
- Monitor for fault codes related to PM levels
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Component Specifications
Overview
- Type
- Oxygen (O2) and NOx sensors
- Configuration
- Dual-sensor system for exhaust monitoring
- Platform
- Integrated with ECU for real-time feedback
- Material
- High-temperature ceramic and stainless steel
- Location
- Mounted in exhaust system pre- and post-catalytic converter
Dimensions
- Sensor Length
- 3.15 in (80 mm)
- Sensor Diameter
- 0.79 in (20 mm)
- Thread Size
- M18 x 1.5
- Cable Length
- 23.62 in (600 mm)
- Operating Temperature
- -40°F to 1562°F (-40°C to 850°C)
- Weight
- 0.22 lbs (100 g)
- Response Time
- 0.2 seconds
Materials
- Sensor Body
- Stainless steel 304
- Sensing Element
- Zirconium dioxide ceramic
- Protective Tube
- Alumina ceramic
- Cable insulation
- High-temperature silicone
- Connector
- Nickel-plated brass
Features
- Performance
-
- Wide-range air-fuel ratio detection
- High accuracy NOx measurement
- Fast response time for real-time adjustments
- Self-diagnostic capability
- Durability
-
- Resistant to thermal shock
- Corrosion-resistant materials
- Sealed against moisture ingress
- Vibration-resistant design
- integration
-
- CAN bus communication
- Plug-and-play installation
- Compatible with Mercedes STAR Diagnostics
- Adaptive learning for long-term accuracy
- Environmental
-
- Compliant with Euro 5 and Euro 6 standards
- Low power consumption
- Recyclable materials
- Reduced emissions output
Safety Features
- Electrical Safety
-
- Short-circuit protection
- Overvoltage protection
- Thermal Protection
-
- Automatic shutdown at extreme temperatures
- Heat-resistant insulation
- Mechanical Safety
-
- Vibration-resistant mounting
- Impact-resistant housing
Comfort Features
- installation
-
- Tool-free connector
- Pre-calibrated for easy setup
- Maintenance
-
- Self-cleaning function
- Long service life
- Noise Reduction
-
- Quiet operation
- Minimal exhaust turbulence
Accessories
- installation Tools
-
- O2 sensor socket
- Anti-seize compound
- Torque wrench
- Replacement Parts
-
- Sensor gasket
- Wiring harness
- Protective cap
- Diagnostic Tools
-
- STAR Diagnostics scanner
- Multimeter
- OBD-II adapter
Maintenance
- Service interval
- Every 60,000 miles or 5 years
- Service Items
-
- Inspect sensor wiring
- Check for exhaust leaks
- Test sensor response time
- Clean sensor tip
- Verify ECU communication
- Maintenance Notes
- Avoid using silicone-based sealants near the sensor
Warranty
- Standard Warranty
- Miles: 50,000Years: 4Coverage: Parts and labor
- Extended Warranty
- Miles: 100,000Years: 7Coverage: Parts only
- Emissions Warranty
- Miles: 80,000Years: 8Coverage: Sensor replacement
- Warranty Terms
- Void if non-OEM parts are used or improper installation
Production Details
- Manufacturer
- Bosch GmbH
- Manufacturing Process
-
- Precision ceramic molding
- Automated assembly
- Laser welding
- Quality Control
- Testing: Thermal cycling, Vibration testing, Electrical performanceCertifications: ISO 9001, ISO 14001
- Sustainability Practices
-
- Recycled materials in packaging
- Energy-efficient production
- Waste reduction initiatives
- Production Metrics
- Annual Output: 2 million unitsDefect Rate: 0.01%Lead Time: 4 weeks
Service Information for emissions_sensors Service
Maintenance and service requirements specific to emissions sensors
- Inspect sensor wiring for damage
- Check for exhaust leaks near sensor
- Test sensor response time using diagnostics
- Clean sensor tip with approved cleaner
Avoid using silicone-based products near the sensor
- Perform full diagnostic scan
- Verify ECU communication with sensor
- Replace sensor gasket if necessary
- Check for corrosion on sensor body
Use OEM parts for replacements
- Replace oxygen sensor as preventive maintenance
- Inspect and replace wiring harness if needed
- Test NOx sensor functionality
- Verify emissions compliance
Critical to maintain emissions system performance
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What are the compatibility requirements for emissions sensors in 2011-2015 Mercedes M-Class?
What are the compatibility requirements for emissions sensors in 2011-2015 Mercedes M-Class?
The emissions sensors for 2011-2015 Mercedes M-Class are designed to be compatible with specific engine models, including the 3.0L V6 diesel (OM642) and 3.5L V6 gasoline (M276). These sensors comply with Euro 5 and Euro 6 emission standards. Ensure the sensor part numbers match the vehicle’s VIN for proper integration. Always verify compatibility with the manufacturer’s database or consult a certified technician.
Q2 What are the maintenance requirements for emissions sensors in a 2011-2015 Mercedes M-Class?
What are the maintenance requirements for emissions sensors in a 2011-2015 Mercedes M-Class?
Emissions sensors in the 2011-2015 Mercedes M-Class require periodic inspections every 15,000 miles or annually. Check for carbon buildup, wiring integrity, and sensor responsiveness. Replace faulty sensors promptly to avoid increased emissions or engine performance issues. Use OEM or equivalent parts to maintain accuracy. Regular software updates from Mercedes-Benz are also recommended to ensure optimal sensor functionality.
Q3 How do I install or replace emissions sensors in a 2011-2015 Mercedes M-Class?
How do I install or replace emissions sensors in a 2011-2015 Mercedes M-Class?
To install or replace emissions sensors, first locate the sensor near the exhaust system. Disconnect the battery, remove the electrical connector, and unscrew the sensor using a specialized wrench. Install the new sensor by tightening it to the specified torque (typically 40-50 Nm). Reconnect the electrical connector and battery. Clear any error codes using a diagnostic tool and test the vehicle to confirm proper operation.
Q4 How do I troubleshoot emissions sensor issues in a 2011-2015 Mercedes M-Class?
How do I troubleshoot emissions sensor issues in a 2011-2015 Mercedes M-Class?
If the emissions sensor triggers a warning light, use an OBD-II scanner to retrieve error codes. Common issues include faulty wiring, sensor contamination, or exhaust leaks. Inspect the sensor for damage or buildup and test its resistance with a multimeter. Replace the sensor if it fails the test. Ensure the exhaust system is intact and there are no leaks affecting sensor readings.
Q5 How can I optimize the performance of emissions sensors in a 2011-2015 Mercedes M-Class?
How can I optimize the performance of emissions sensors in a 2011-2015 Mercedes M-Class?
To optimize emissions sensor performance, use high-quality fuel to minimize carbon buildup. Regularly inspect and clean the sensor and surrounding areas. Ensure the engine is tuned correctly and the exhaust system is leak-free. Update the vehicle’s software to the latest version for improved sensor calibration. Avoid short trips, as they can lead to incomplete combustion and sensor fouling.
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 M-Class Service Manual (2011-2015)
Coming SoonDetailed service manual covering emissions sensor maintenance, troubleshooting, and replacement procedures for the 2011-2015 Mercedes M-Class.
Technical Service Bulletin: Emissions Sensor Updates
Coming SoonLatest updates and improvements for emissions sensors in the 2011-2015 Mercedes M-Class, including software enhancements and part revisions.
Mercedes-Benz M-Class Parts Catalog
Coming SoonComprehensive catalog of OEM parts, including emissions sensors, for the 2011-2015 Mercedes M-Class.
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