FITMENT:
Compatible with Mercedes-Benz diesel vehicles equipped with SCR (AdBlue/DEF) emission systems, including:

• Sprinter W906 (2500 / 3500 diesel)
• W222 (S-Class Bluetec diesel variants)
• W205 / W213 / W447 (some engine configurations depending on SCR setup)
• GLC (X253), SLK/SLC (R172), S-Class Bluetec models

OEM reference number: A0009050008 (also 0009050008).

This NOx sensor is used in diesel SCR aftertreatment systems to measure nitrogen oxide levels in exhaust gas and control AdBlue dosing for emissions compliance.

FUNCTION:

• Measures NOx concentration in exhaust stream
• Sends real-time data to ECU for SCR/DEF dosing control
• Ensures Euro 5 / Euro 6 emissions compliance
• Helps optimize catalyst efficiency and prevent engine derate

INSTALLATION POSITION:

• SCR system inlet or outlet sensor (depends on vehicle configuration)
• Mounted on exhaust pipe before or after SCR catalyst

FAQ:

Q1: Is this inlet or outlet sensor?
A1: It can be used as either inlet or outlet depending on Mercedes SCR layout. OEM matching is required to confirm position.

Q2: What vehicles does it fit?
A2: Commonly used on Sprinter W906, S-Class W222, GLC, SLK/SLC, and some W205/W213 diesel configurations.

Q3: What are failure symptoms?
A3: SCR/AdBlue warning, engine limp mode, incorrect NOx readings, or emissions fault codes.

Q4: Is A0009050008 interchangeable with other sensors?
A4: Some cross references exist, but different software/calibration versions mean not all are interchangeable.

Q5: Does it require programming after replacement?
A5: Some Mercedes models require SCR reset or ECU adaptation after installation.