Remove/install injection nozzle for exhaust aftertreatment system - AR14.40-P-2000GZB

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ENGINE 642 in MODEL 164, 166, 212, 218, 221, 251 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))

ENGINE 642, 651 in MODEL 212, 218 with CODE U77 (Diesel Emission control BLUETEC (SCR))

ENGINE 642.886 in MODEL 463.306/336/346

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

Shown on model 251

Fig 1: Injection Nozzle For Exhaust Aftertreatment System 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	Raise vehicle	MODEL 164, 166, 212, 218, 221, 251 with ENGINE 642 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) MODEL 166 with ENGINE 651 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) MODEL 212, 218 with ENGINE 642, 651 with CODE U77 (Diesel Emission control BLUETEC (SCR)) MODEL 463.306/336/346 with ENGINE 642.886
		MODEL 463.306/336/346 with ENGINE 642.886	AR00.60-P-1000G
		MODEL 251 with ENGINE 642 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))	AR00.60-P-1000RT
		MODEL 221 with ENGINE 642 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))	AR00.60-P-1000SX
		MODEL 164, 166 with ENGINE 642 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) MODEL 166 with ENGINE 651 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))	AR00.60-P-1000GZ
2	Disconnect AdBlue® line (1)	To do this pull protective sleeve over the AdBlue® line (1) and detach safety clamp from AdBlue® line (1). Clean AdBlue® line (1) at connection immediately and seal with grommet. Replace sealing ring.
		Record plug	Figure
3	Disconnect electrical connection (2) from AdBlue® metering valve (Y129)
4	Remove screw/bolt (3) completely from clamp
5	Remove clamp and then remove AdBlue® metering valve (Y129)	Replace clamp if necessary. Check positioning of AdBlue® metering valve (Y129), the lugs of the AdBlue® metering valve (Y129) must be located in the exhaust pipe grooves.
6	Install in the reverse order
7	Connect diagnostic system, read out fault memory and delete if necessary
			AD00.00-P-2000-04A

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

Courtesy of MERCEDES-BENZ USA