Remove/install CMS rear end - AR88.20-P-1950MCC

MODEL 451.3/4 

Fig 1: Identifying CMS Rear End Remove/Install Components

Courtesy of MERCEDES-BENZ USA

Vehicles with Motor 660 and code (474) Diesel particulate filter (closed) 

Fig 2: Identifying CMS Rear End Remove/Install Components - Vehicles With Motor 660 And Code (474)

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove rear CBS		AR88.20-P-1900MCC
2	Unscrew bolts (4) and lay bracket down to side together with diesel particulate filter differential pressure sensor (B28/8)	On vehicles with engine 660 and code (474) Diesel particulate filter (closed)
3	Unscrew bolts (2) from CMS rear-end (1) and remove CMS rear-end (1)	The outer four bolts (2) are accessible from the rear and the inner two bolts (2) from the front.
			*BA64.20-P-1001-01B
4	Unscrew bolts on bracket (3) from CMS rear-end (1) and remove bracket (3)	When replacing CMS rear-end (1). The brackets (3) are fastened to the CMS rear-end (1) with one bolt each.
5	Install in the reverse order