Remove/install AdBlue delivery module - AR14.40-P-2021GZB

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2016 Mercedes-Benz E63 S AMG, 2016 Mercedes-Benz E400, 2016 Mercedes-Benz E350, 2016 Mercedes-Benz E300, and 2016 Mercedes-Benz E250. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE 642 in MODEL 164, 212, 218, 221, 251 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))

ENGINE 642 in MODEL 212, 218 with CODE U77 (Diesel Emission control BLUETEC (SCR))

ENGINE 642, 651 in MODEL 166 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))

ENGINE 651 in MODEL 212, 218 with CODE U77 (Diesel Emission control BLUETEC (SCR))

Shown on model 251

Fig 1: Adblue Delivery Module Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Risk of burn injuries and scalding when working at AdBlue lines and the components attached to them. Risk of injury to skin and eyes when handling AdBlue. Risk of poisoning caused by swallowing AdBlue	Pour AdBlue into suitable containers only. Wait until the pressure is released before starting any work on the exhaust aftertreatment system.	AS14.40-Z-0001-01A
	Notes on use, material properties and handling of AdBlue®		AH14.40-N-0001-01AB
	Remove/install
1	Remove AdBlue® container	ENGINE 642, 651 in MODEL 166 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))	AR14.40-P-2014GQ
		ENGINE 642 in MODEL 164, 251 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))	AR14.40-P-2014GZB
		ENGINE 642 in MODEL 212, 218, 221 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) ENGINE 651 in MODEL 212, 218 with CODE U77 (Diesel Emission control BLUETEC (SCR))	AR14.40-P-2014OGE
2	Release and disconnect electrical connections (3, 5, 6)
3	Detach AdBlue® line on AdBlue® delivery module (A103/2) from fitting (4)	ENGINE 642 in MODEL 164, 212, 218, 221, 251 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) Immediately clean AdBlue® line and delivery module (A103/2) on the connections and close off. Replace sealing ring. Record plug
			Figure
4	Remove screw/bolts (2)	MODEL 212 with ENGINE 651 with CODE U77 (Diesel Emission control BLUETEC (SCR)) without CODE U42 (BlueTEC diesel exhaust treatment (SCR))	*BA14.40-P-1004-02D
		MODEL 164, 212, 218, 221, 251 with ENGINE 642 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) MODEL 166 with ENGINE 642, 651 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) MODEL 212, 218 with ENGINE 642 with CODE U77 (Diesel Emission control BLUETEC (SCR)) MODEL 218 with ENGINE 651 with CODE U77 (Diesel Emission control BLUETEC (SCR))	*BA14.40-P-1003-02A
5	Remove AdBlue® delivery module (A103/2) from AdBlue® container
6	Close off connections on AdBlue® (A103/2) delivery module	Record plug	Figure
7	Install in the reverse order
8	Write fill level of AdBlue® container using diagnostic system in AdBlue® control unit (N118/5) and read off fault memory
			AD00.00-P-2000-04A

EXHAUST AFTERTREATMENT, BLUE TEC

Number	Designation		ENGINE 642 with CODE U77	ENGINE 642 with CODE U42
BA14.40-P-1003-02A	Bolt, delivery module to AdBlue® tank module	Nm	6	5

EXHAUST AFTERTREATMENT, BLUE TEC

Number	Designation		ENGINE 651 in MODEL 218 with CODE U77	Engine 651 with code U42
BA14.40-P-1003-02A	Bolt, delivery module to AdBlue® tank module	Nm	6	5

EXHAUST AFTERTREATMENT, BLUETEC

Number	Designation		ENGINE 651 in MODEL 212 with CODE U77
BA14.40-P-1004-02D	Bolt, delivery module to AdBlue® tank module	Nm	6

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA