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Remove/install pressure transducer for wastegate aneroid capsule - AR09.40-P-1005CD

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ENGINES 651 in MODELS 166, 172, 204, 207, 212, 218, 221 

Fig 1: Pressure Transducer For Wastegate Aneroid Capsule Remove/Install Components
G09974872Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
1 Remove cylinder head cover trim    
2 Remove intake hose upstream of air filter housing    
3 Install cover for belt drive IMPORTANT To do this detach cover for upper belt drive to the front and upwards.  
4 Disconnect electrical connector (1) from low-pressure turbocharger boost pressure sensor (B5/4)    
5 Remove screw/bolt (2) and low-pressure turbocharger boost pressure sensor (B5/4)    
6 Detach vacuum hoses (3) INSTALLATION IMPORTANT The vacuum hose (3) marked in color comes on the center connector.  
7 Disconnect electrical connection (4) on boost pressure control flap pressure transducer (Y93) or on exhaust flap switchover valve (Y93)    
8 Remove screw/bolts (5) and remove boost pressure control flap pressure transducer (Y93) or exhaust flap switchover valve (Y93)    
9 Install in the reverse order