91-1
 
     
Radio systems 
     
General information
 
     
CAUTION! 
     
Before working on the electrical system: 
     
Determine the correct coding for the anti-
theft radio. 
     Disconnect the battery Ground (GND) 
strap. 
     
Note:  
     After re-connecting the battery, activate the 
vehicle's electrical equipment (radio, clock, 
power windows, engine) according to the owner's 
manual. 
Pa
ge 1 of 45 Radio s
ystems
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE02.91.1