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Home >> Smart >> 2015 >> Fortwo Electric Drive, 2D Convertible >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control - 451 Chassis >> Testing & Repair >> Remove/install heater/ventilation operating unit >> Remove/install heater/ventilation operating unit - AR83.20-P-1850MCC

Remove/install heater/ventilation operating unit - AR83.20-P-1850MCC

MODEL 451.3/4 up to 30.8.10 except CODE (I01) Air conditioning Plus 

Fig 1: Identifying Heater/Ventilation Operating Unit Remove/Install Components
G10979010Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
1.1 Remove center stowage compartment on center part of dashboard For vehicles without code (C50) smart radio 10 or without code (C57) smart radio 9 AR68.10-P-1620MCC
1.2 Remove smart radio 9 or smart radio 10 For vehicles
with code (C50) smart radio 10 or with code (C57) smart radio 9
AR82.60-P-7502MCC
2 Turn air distribution control lever (1) to footwell ventilation position    
3 Move temperature control lever (2) to lowest position    
4 Set fan speed control lever (4) to speed 2    
5 Remove screws (3) on heater/air conditioning operating unit (N23)    
6 Use a suitable screwdriver (10) to release bracket (arrow C) of flexible shaft (6) and detach flexible shaft (6) from guide wheel (11)    
7 Press back catch hook (arrow B) and remove eyelet (8) from relay lever (9)    
8 Press catch hook (arrows A) together using suitable pliers and press cable (7) out of bracket on heater housing in direction of arrow    
9 Release electrical connectors (5) and disconnect from heater/AC operating unit (N23)    
10 Remove heater/air conditioning operating unit (N23) IMPORTANT Note installation position of flexible shaft (6) and cable (7).  
11 Remove cable (7) When the operating unit is replaced Heater/AC (N23). AR83.20-P-1400MCC
12 Remove flexible shaft (6) When the operating unit is replaced Heater/AC (N23). AR83.10-P-1401MCC 
13 Install in the reverse order    
14 Perform function test on heater/air conditioning operating unit (N23)