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Home >> Mercedes Benz >> 2009 >> E550 Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control -- Testing & Repair -- E550 (211.072) >> Testing & Repair >> Remove and install control and operating unit - AR83.40-P-6350T

Remove and install control and operating unit - AR83.40-P-6350T

MODEL 211.0/2/6 

Front control and operating unit 

Fig 1: Identifying Front Control And Operating Unit Components
G07507282Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
MODIFICATION NOTES

5.7.06 "Disconnect/connect battery ground line" removed
REMOVINGINSTALLING Remove/install     
NOTES Notes on avoiding damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
1 Remove loudspeaker in instrument panel   AR82.62-P-7833T
2 Remove right trim strip on instrument panel   AR68.10-P-1180T
3 Remove bolts (2)    
4 Remove AAC [KLA] control and operating unit (N22) or comfort AAC [KLA] control and operating unit (N22/7) from instrument panel together with center air outlet (1) until electrical connectors (3, 4) are accessible    
5 Disconnect electrical connectors (3, 4)    
6 Unscrew bolts (arrows).    
7.1 Remove AAC [KLA] control and operating unit (N22) or comfort AAC [KLA] control and operating unit (N22/7) from center air outlet (1) Only when replacing AAC [KLA] control and operating unit (N22) or comfort AAC [KLA] control and operating unit (N22/7).  
8 Install in the reverse order