FITMENT:
Compatible with Mercedes-Benz diesel vehicles equipped with SCR (AdBlue/DEF) Euro 5 / Euro 6 systems, including:

• C-Class W205 / S205 (C220d, C250d)
• E-Class W212 / S212 / A207 / C207 (E220d, E250 CDI)
• S-Class W222 / V222 (diesel SCR models)
• GLE / ML W166 / W164 (diesel BlueTEC)
• GL / X164 / GLK X204
• CLS W218 / X218
• Sprinter / Vito (selected SCR variants depending on engine)

OEM / Cross reference numbers:

• 5WK96622 / 5WK9 6622
• A0009052210 / A 000 905 22 10
• A0009053603 / A0009053410 (related variants in same family)

This is a Mercedes SCR NOx sensor used in exhaust aftertreatment systems, typically part of inlet/outlet NOx monitoring for Euro 6 diesel emissions control.

FUNCTION:

• Measures nitrogen oxide (NOx) levels in diesel exhaust gas
• Sends real-time data to ECU via CAN communication
• Controls AdBlue (DEF) injection for SCR efficiency
• Monitors catalyst performance and emissions compliance
• Prevents engine derate and SCR system faults

INSTALLATION POSITION:

• SCR system inlet or outlet sensor (depends on vehicle configuration)
• Mounted on exhaust line between DPF and SCR catalyst or after SCR unit

IMPORTANT NOTE:
Mercedes NOx sensors like 5WK96622 / A0009052210 are part of a shared smart sensor family, meaning:

• Same design may have different calibration versions
• Inlet and outlet sensors are NOT interchangeable
• ECU coding determines function (not just physical part)

Wrong matching can cause SCR warning, limp mode, or NOx efficiency faults.

FAQ:

Q1: Is this inlet or outlet sensor?
A1: It can be used as inlet or outlet depending on W205/W212/W166 SCR configuration.

Q2: What vehicles use it most?
A2: W205 C220d, W212 E220d/E250, W222 S-Class diesel, and W166 GLE/ML BlueTEC.

Q3: What are failure symptoms?
A3: SCR/AdBlue warning, engine derate, limp mode, incorrect NOx readings, fault codes (P229F, etc.).

Q4: Are 5WK96622 and A0009052210 the same?
A4: Yes, 5WK96622 is the Continental manufacturer reference for Mercedes OEM A0009052210 family.

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