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

• C-Class W205 / S205 / C205 / A205 (C220d / C250d)
• E-Class W213 / S213 / C207 / A207 (E220d / E250 CDI)
• S-Class W222 / V222
• GLE / ML W166 / W164
• GL / GLS X164 / X166
• CLS C218 / X218
• Sprinter / Vito (select SCR diesel variants)

OEM / Cross reference numbers:

• A0091530028 / A 009 153 00 28
• A0091530004 / A 009 153 00 04
• 5WK96653B / 5WK9 6653B
• A0101539528 / 0009058011 (related family references)

This NOx sensor is part of the Mercedes SCR exhaust aftertreatment system, used to monitor nitrogen oxide levels in diesel exhaust and control AdBlue dosing for emissions compliance.

FUNCTION:

• Measures NOx concentration in exhaust gas
• Sends data to ECU via CAN communication
• Controls SCR/AdBlue injection strategy
• Monitors catalyst efficiency and emissions performance
• Ensures Euro 5 / Euro 6 compliance and prevents engine derate

INSTALLATION POSITION:

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

IMPORTANT NOTE:
Mercedes NOx sensors like 5WK96653B belong to a large interchangeable sensor family, meaning:

• Same physical design across multiple Mercedes platforms
• Inlet and outlet sensors are NOT interchangeable
• ECU calibration determines correct use (position-specific)

Incorrect matching may cause SCR faults, AdBlue warnings, or limp mode.

FAQ:

Q1: What vehicles does it fit?
A1: C-Class W205, E-Class W213, S-Class W222, GLE W166, and other Mercedes diesel SCR models.

Q2: Is this inlet or outlet sensor?
A2: It can be used as inlet or outlet depending on SCR system configuration.

Q3: What are failure symptoms?
A3: SCR warning light, engine derate, AdBlue system faults, NOx sensor error codes, limp mode.

Q4: Are 5WK96653B and A0091530028 the same?
A4: Yes, 5WK96653B is the Continental reference for Mercedes OEM A0091530028 family.

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