Remove/Install Cylinder Head Cover Trim Panel - Ar01.20-D-5015SG

ENGINES 642 in MODEL 639 Cover on the left cylinder head cover 

ENGINES 642.896 /898 /992 /993 in MODEL 906 Cover on left cylinder head cover 

Fig 1: Cylinder Head Cover Trim Panel Remove/Install Component Locations - Shown On Engine 642.992 In Model 906

Courtesy of MERCEDES-BENZ USA

Fig 2: Wiring Harness & Front Soundproofing Component Locations

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove windshield fluid reservoir windshield washer system and hand up to side	Only on model 906 Do not detach lines connected	AR82.35-D-6000SD
2	Remove turbocharger (1) noise damper	Engine 642.896/898/993 in model 906	AR09.40-D-6920SG
3	Remove rear engine cover	Only with engine 642 in model 639
4	Remove bolts (3, 4)	Model 639
		Model 906
5	Undo screw (5) by about 3 revolutions	Model 639
		Model 906
6	Push engine charge air duct (6) to side	Carefully push engine charge duct (6) to side to prevent damaging adjacent components.
7	Remove wiring harness (10) from bracket	Only on model 639
8	Unclip cover (2) upward	Installation:  The sound dampening (9) must be correctly positioned in the cover (2). Mounts (8) on cover (2) must engage in ball heads (7).
9	Remove front soundproofing (11)	Only on model 639
10	Install in the reverse order