20-3
      
CAUTION! 
     
BEFORE disconnecting the battery: 
     
Stop the engine.
     Be sure the ignition is switched off (also 
applies when connecting the battery). Failure 
to do so may damage the Engine Control 
Module (ECM). 
     Be sure of the proper radio code (for vehicles 
equipped with coded anti-theft radio) 
     
Be sure the battery negative (-) cable is 
disconnected, when: 
     Working on the electrical system.
     Resistance (spot) welding or electric arc-
welding anywhere on the vehicle. 
     
When connecting and disconnecting 
electrical test equipment (LED voltage tester, 
multimeter, etc.) 
     Be sure the ignition is switched off.
     Use correct adapters from VW 1594 
Pa
ge 4 of 8 Fuel su
pp
ly system, servicin
g guidelines
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.1 
         
        
        20-5
       Observe following points before working on the 
fuel supply system  
     
CAUTION! 
     
Obtain the radio Anti-theft code from the 
customer before disconnecting the Battery 
Ground strap. 
     
With ignition switched OFF, disconnect Battery 
Ground strap. 
     Open the fuel filler cap briefly and close 
again. 
      Observe the following precautions when 
removing or installing components from a filled or 
partially filled fuel tank.  
     
WARNING! 
     
Empty the fuel tank before removal! If it is not 
empty, the weight and sloshing fuel could 
lead to injury, component damage or possible 
fuel spillage. 
     Fuel tank must not be filled more than 
1/3 
maximum. 
     
Reduce fuel quantity using fuel cart, if 
Pa
ge 7 of 8 Fuel su
pp
ly system, servicin
g guidelines
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.1