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Home >> Smart >> 2015 >> Fortwo Electric Drive, 2D Convertible >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Air Intake, Turbocharging - 451 Chassis >> Testing & Repair >> Remove/install resonance chamber - AR09.20-P-0010MCU

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 Remove/Install Components - Shown On Vehicle With Code (494) USA Version
G10978129Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING 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) IMPORTANT Retrofit clamp (8) on vehicles where not installed.
INSTALLATION IMPORTANT : Replace clamp (8). Install clamp (8) as near as possible to resonator (1).
Clamping pliers with side blade
 
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