FITMENT
Compatible with Mercedes-Benz diesel vehicles equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include:

• W166 (ML / GLE series)
• W172 (SLK / SLC series)
• W205 (C-Class)
• W212 / W213 (E-Class variants)
• W221 (S-Class)
• C300 / ML350 diesel models
  Using reference:
• A0009056204
• 5WK97249
• SNS736A (cross-reference depending on supplier listing)

Designed for Euro 5 / Euro 6 diesel SCR systems.

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide (NOx) levels in the exhaust system and sends real-time data to the ECU to control AdBlue/DEF injection and reduce emissions.

Q2: Where is it installed?
A2: It is installed in the exhaust aftertreatment system, usually before or after the SCR catalytic converter depending on engine configuration.

Q3: What are symptoms of failure?
A3: Check engine light, SCR/AdBlue system warnings, NOx sensor fault codes, reduced engine performance, or limp mode activation.

Q4: Are all listed Mercedes models supported?
A4: No, compatibility depends on engine type (diesel variants), emission standard, and SCR system setup. Always match OEM number before installation.