400SEL (140.043) V8-4.2L (119.971) (1993)
4
Disconnect electrical connectors on rear of radio and navigation operating unit (APS) (A2/29)
5
Activate unit code for APS
NOTE: Is necessary only when a new radio and navigation operating unit is put into operation for the first time
6
Install in opposite order
NOTE: Voice prompt is loaded automatically within 20 minutes after connecting the battery
Commercially Available Tools
Commercially Available Tools
Remove/Install Radio
Single-Module Unit, Two-Component Pushbutton Control Module, Radio/Navigation System Pushbutton Unit (APS)
Quiescent current retention unit
disconnect, connect.
Ground lead on battery
disconnect, connect.
Removal keys (1) .
insert, remove.
Radio (A2), radio control module (A2/4) or radio/navigation system pushbutton unit (A2/29)
pull out, slide in.
NOTE: Push retaining springs back on removed radio and pull out removal keys (1).