Remove/install diffuser at metering device of exhaust gas aftertreatment system · ar4920g2043ch · Mercedes-Benz WIS

AR49.20-G-2043CH

Remove/install diffuser at metering device of exhaust gas aftertreatment system

15.06.2018

Engine	457.9, 458.9, 541.9, 542.9, 941.9, 942.9 in model 000.001
	with BlueTec

1	Compressed air pipe
2	O-ring (green)
3	Sealing ring (permanently attached to diffuser)
4	Diffuser
5	Sealing ring (permanently attached to diffuser)
6	O-ring (green)
7	Metering device housing
8	Bolts
12	Heating element

G49.20-3225-12

 Warning	Risk of burn injuries and scalding when working on AdBlue(R) lines and the component parts attached to them. Risk of injury to skin and eyes when handling AdBlue(R). Risk of poisoning caused by swallowing AdBlue(R)	Pour AdBlue® only into suitable containers. Wait until the pressure is released before starting any work on the exhaust aftertreatment system.	AS49.20-Z-0002-01A
	Notes on use, material properties and handling of AdBlue®		AH14.40-N-0001-01A
	Note on calculation of tightening torque when using insertion or socket tools with various effective lengths		AH00.00-P-0015-01CW
	Remove
1	Remove metering device.	Engine 457.9, 458.9	AR49.20-G-2002CH
		ENGINE 541.9, 542.9, 941.9, 942.9	AR49.20-G-2002CI
2	Remove diffuser (4).		AR49.20-G-2043-01CH
	Install
3	Clean assembly area of the diffuser (4).	 After removal, metering device must be free of any soiling in diffuser (4) assembly area. Otherwise, damage can occur to metering device.
		 Remove AdBlue® residues with a lint-free dry cloth. For larger amounts, rinse with clean water and dry with compressed air.
4	Attach new diffuser (4).		AR49.20-G-2043-01CH
		 Compressed air pipe to housing	*BA14.40-N-1044-02H
		ABS sensor grease	*BR00.45-Z-1019-06A
5	Install metering device.	Engine 457.9, 458.9	AR49.20-G-2002CH
		ENGINE 541.9, 542.9, 941.9, 942.9	AR49.20-G-2002CI

 Exhaust aftertreatment, BlueTec

Number	Designation		Engine 457.9, 458.9	engine 541.9, 941.9
BA14.40-N-1044-02H	Compressed air pipe to housing	Nm	6	6

 Exhaust aftertreatment, BlueTec

Number	Designation		Engine 542.9, 942.9
BA14.40-N-1044-02H	Compressed air pipe to housing	Nm	6

Repair materials

Number	Designation	Order number
BR00.45-Z-1019-06A	ABS sensor grease	A 000 989 62 51 10

ah0000p001501cw Avvertenza per il calcolo della coppia di serraggio in caso di impiego di attrezzi ad innesto con lunghezze effettive differenti
ah1440n000101a Avvertenze sull'impiego, sulle caratteristiche e sulla manipolazione dell'AdBlue
ar4920g2002ch
ar4920g2002ci
ar4920g204301ch Smontare, montare il diffusore sul dosatore del sistema di post-trattamento dei gas di scarico
as4920z000201a Pericolo di ustioni e scottature dovute a liquido bollente durante i lavori sulle tubazioni AdBlue(R) e sui componenti ad esse collegati. Pericolo di lesioni alla pelle e agli occhi durante la manipolazione di AdBlue(R). Pericolo