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

• Mercedes SLK (selected diesel SCR variants)
• Mercedes Sprinter W906 / W907 (2.1L / 3.0 CDI SCR engines)
• Mercedes V-Class W447 / Vito W447
• Mercedes Vito W639 (Euro 5 SCR versions)
• Some GLK / C-Class / E-Class diesel SCR variants depending on engine

OEM / Cross reference numbers (varies by exact engine setup):

• A0009052800 / A0009053603 / A0009052912 (family references)
• 5WK9 series (e.g., 5WK96682 / 5WK972xx depending on version)
• A2CXXXXX / SNS sensor platform references

FUNCTION:

• Measures nitrogen oxide (NOx) levels in diesel exhaust
• Sends data to ECU via CAN communication
• Controls AdBlue (DEF) injection in SCR system
• Ensures Euro 5 / Euro 6 emissions compliance
• Helps prevent engine derate and SCR faults

INSTALLATION POSITION:

• SCR inlet or outlet NOx sensor (depends on vehicle configuration)
• Mounted on exhaust line before or after SCR catalyst
• Sprinter/Vito commonly uses dual sensor setup (upstream + downstream)

IMPORTANT NOTE:
Mercedes NOx sensors for SLK / Sprinter / V-Class / Vito belong to a shared SCR sensor family, meaning:

• Same design but multiple calibration versions exist
• Inlet and outlet sensors are NOT interchangeable
• Exact compatibility depends on VIN, engine code, and emission standard

Incorrect selection may cause SCR warning lights, AdBlue errors, or limp mode.

FAQ:

Q1: Which models does this fit most commonly?
A1: Sprinter W906/W907 and Vito/V-Class W447 diesel SCR models.

Q2: Is it inlet or outlet sensor?
A2: It can be inlet or outlet depending on SCR system layout.

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

Q4: Are all Mercedes NOx sensors interchangeable?
A4: No, even similar-looking sensors differ by calibration and position (in/out).

Q5: Does it require coding after installation?
A5: Some Mercedes vans and Sprinter models require SCR reset or adaptation.