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Remove/install vehicle interface (cell phone) - AR82.70-P-8920TX

MODEL 219.3 up to 2.3.08 except CODE (809) Model year 2009 with CODE (386) Preinstallation for telephone "Cell phone" UPCI [UHI] system with CODE (388) Telephone "Cell phone" UPCI [UHI] system 

Fig 1: Identifying Vehicle Interface (Cell Phone) Remove/Install Components
G10768602Courtesy of MERCEDES-BENZ USA
MODIFICATION NOTES

5.7.06 "Disconnect/connect battery ground line" removed    
REMOVINGINSTALLING Remove/Install     
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
1 Stage basic data of the Universal Cell phone Interface (UPCI [UHI]) control unit (N123/1) in STAR DIAGNOSIS When replacing Universal Portable Cell Phone Interface (UPCI [UHI]) control unit (N123/1).
INSTALLATION IMPORTANT Transfer basic data from Star Diagnosis to new Universal Portable Cell Phone Interface (UPCI [UHI]) control unit (N123/1).
 
REFER TO SELF-DIAGNOSTIC SYSTEMS Connect STAR DIAGNOSIS and read out fault memory   AD00.00-P-2000-04TX
2 Remove soundproofing (1)    
3 Remove bolts (2)    
4 Release catches (3) using a suitable screwdriver and remove carrier plate cover (4)    
5 Remove compensator control unit at Universal Portable Cell Phone Interface (UPCI [UHI]) control unit (N123/1) IMPORTANT Do not disconnect electrical connector from compensator control unit. AR82.70-P-0030TX 
6 Remove bolts (5)    
7 Disconnect electrical connector with fiber optic cable (6)    
NOTES Notes on avoiding damage to fiber optic cables during repair work With Media Oriented System Transport (MOST) AH82.60-P-0001-05TX
8 Disconnect electrical connectors (7) and take Universal Cell phone Interface (UPCI [UHI]) control unit (N123/1) off carrier plate (8)    
9 Install in the reverse order