Remove/install resonance chamber - AR09.20-P-0010MCU

ENGINES 132.910 in MODEL 451.3/4 with CODE (494) USA version 

ENGINES 132.910 in MODEL 451.3/4 as of 31.8.10 except CODE (494) USA version 

Shown on vehicle with code (494) USA version 

Fig 1: Identifying Resonance Chamber Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
1	Remove interior flap above engine		AR88.40-P-1100-03MCC
2	Remove O2 sensor downstream of CAT [KAT]	* not for USA	AR07.04-P-0080MCF
3	Unclip vacuum hose (2) from brackets (3) on resonator (1)
4	Remove clamp (8) on crank case vent hose (4) on resonator (1)	Retrofit clamp (8) on vehicles where not installed. Installation:  Replace clamp (8). Install clamp (8) as near as possible to resonator (1). Clamping pliers with side blade gotis://G_58.3_06.2
5	Detach crankcase vent hose (4) on resonator (1)
6	Loosen screw clamps (5) and detach resonator (1) from air filter housing upper section (6) and from throttle valve actuator (M16/6)
7	Unscrew bolt (7) and remove resonator (1)
8	Remove bracket (3) from resonator (1)	When replacing the resonator (1).
9	Install in the reverse order