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Home >> Mercedes Benz >> 2009 >> SL550 >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Body Electrical -- Basic Knowledge - 230 Chassis - 2 Of 2 >> Basic Knowledge >> Universal Portable CTEL Interface (UPCI [UHI]) control unit, location/task - GF82.70-P-5100 >> UPCI (Universal Portable CTEL Interface) control unit, location/task - GF82.70-P-5100R

UPCI (Universal Portable CTEL Interface) control unit, location/task - GF82.70-P-5100R

MODEL 230.4 up to 31.5.04 with CODE (388) "Portable CTEL" UPCI telephone system except CODE (494) USA version except CODE (498) Japan version 

MODEL 230.4 up to 31.5.04 with CODE (386) Preinstallation for "portable CTEL" UPCI telephone system except CODE (494) USA version except CODE (498) Japan version 

MODEL 230.4 up to 30.6.04 with CODE (388) "Portable CTEL" UPCI telephone system with CODE (494) USA version 

Fig 1: Identifying UPCI Control Unit Location
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  UPCI (Universal Portable CTEL Interface) control unit, location The UPCI control unit (Universal Portable CTEL Interface) (N123/1) is located on a device bridge in the rear area above the propeller shaft tunnel.  
  UPCI (Universal Portable CTEL Interface) control unit, task The UPCI control unit (Universal Portable CTEL Interface) (N123/1) converts electrical signals into optical signals and vice-versa.