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

• C218 / X218 (CLS-Class)
• W212 / S212 / A207 / C207 (E-Class)
• W164 / W166 (ML / GLE / GL older Bluetec variants)
• W251 / V251 (R-Class)
• Selected C-Class W204 diesel variants (depending on engine)

OEM reference numbers:

• A0009056104
• 0009056104
• 5WK97248 (Continental sensor reference)

This NOx sensor is used in diesel exhaust aftertreatment systems to measure nitrogen oxide levels for SCR (AdBlue) control and emissions compliance. It is typically used as either upstream or downstream sensor depending on configuration. (turn0search1)

FUNCTION:

• Measures NOx concentration in exhaust gas
• Sends real-time data to ECU for SCR dosing control
• Optimizes AdBlue injection efficiency
• Ensures Euro 5 / Euro 6 emissions compliance

INSTALLATION POSITION:

• SCR system inlet or outlet sensor (vehicle dependent)
• 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 system layout. Exact position must match OEM configuration.

Q2: What vehicles does it fit?
A2: Commonly used on CLS (C218), E-Class (W212/C207), ML (W164/W166), and R-Class (W251) diesel models. (turn0search0)

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

Q4: Is 5WK97248 interchangeable with A0009056104?
A4: Yes, 5WK97248 is the sensor manufacturer number corresponding to Mercedes OEM A0009056104.

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