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

• C-Class W205 / W204 (select SCR diesel models)
• E-Class W212 / W213 (E200d / E220d / E250 CDI)
• S-Class W221 / W222
• ML / GLE W166 / W164
• GL / GLS X164 / X166
• GLK X204
• CLS W218
• Sprinter / Vito (select SCR diesel variants)

OEM / Cross reference numbers:

• A0009054410
• A0009052310
• A0009056204
• 5WK97249 / 5WK9 7249
• A0009050108 / A0009053000 (related family variants)

These NOx sensors are part of the Mercedes SCR exhaust aftertreatment system, used to measure nitrogen oxide levels and control AdBlue dosing for emissions compliance.

FUNCTION:

• Measures NOx concentration in diesel exhaust gas
• Sends real-time 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 (depends on vehicle configuration)
• Mounted on exhaust line before or after SCR catalyst

IMPORTANT NOTE:
These Mercedes NOx sensors belong to the same sensor family group, meaning:

• A0009054410 / 2310 / 6204 are often interchangeable within certain SCR positions
• But inlet vs outlet sensors are NOT universally compatible
• ECU software calibration determines correct usage

Incorrect matching can cause SCR warning lights, AdBlue faults, or limp mode.

FAQ:

Q1: Are these sensors inlet or outlet?
A1: They can be used as inlet or outlet depending on Mercedes SCR configuration and engine type.

Q2: What vehicles use them most?
A2: ML, GLK, GLE, E-Class W212/W213, S-Class W221/W222 diesel SCR systems.

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

Q4: Are A0009054410 / 2310 / 6204 interchangeable?
A4: They are part of the same NOx sensor family, but exact compatibility depends on ECU and position (inlet/outlet).

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