Remove/install NOx sensor with controller unit - AR14.40-P-2038GZB
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 Mercedes-Benz ML350, 2010 Mercedes-Benz ML350, 2009 Mercedes-Benz ML320, 2009 Mercedes-Benz GL320, and 2008 Mercedes-Benz ML320. However, it is still accessible from the selected car via links, so may be relevant.
ENGINES 642 in MODEL 251, 164 with CODE (U42) BlueTEC (SCR) diesel exhaust treatment
MODIFICATION NOTES
| 28.1.10 | When replacing the NOx sensors the SCN coding for the NOx sensor must be adapted in the CDI control unit | Step 8 |
| Remove/install | |||
| 1 | Expose control unit (1) | ||
| Model 164 | AR61.30-P-1001GZ | ||
| Model 251 | AR61.30-P-1001RT | ||
| 2 | Disconnect electrical connector (3) | ||
| 3 | Detach shield (5) | Remove nuts (4). |
|
| 4.1 | Remove NOx sensor downstream of diesel particulate filter (N37/7b1) on exhaust pipe | ||
| *BA14.40-P-1005-02A | |||
| 4.2 | Remove NOx sensor downstream of (N37/8b1) SCR catalytic converter | ||
| *BA14.40-P-1004-02A | |||
| 5 | Route NOx sensor downstream of diesel particulate filter (N37/7b1) and behind the shield | ||
| 6.1 | Remove NOx sensor downstream of diesel particulate filter (N37/7b1) with controller unit | ||
| 6.2 | Remove NOx sensor downstream of SCR catalytic converter (N37/8b1) with controller unit | Remove two plastic nuts (2). |
|
| 7 | Install in the reverse order | ||
| 8 | Adapt SCN coding of the NOx sensors in the CDI control unit |
EXHAUST AFTERTREATMENT, BLUE TEC
| Number | Designation | Engine 642 with code U42 | |
|---|---|---|---|
| BA14.40-P-1004-02A | NOx sensor downstream of SCR catalytic converter | Nm | 60 |
| BA14.40-P-1005-02A | NOx sensor downstream of DPF | Nm | 60 |