Removing and installing engine control unit -J623- (with protective housing)Removing and installing ignition key battery
Removing
–
Folding out key bit -1--arrow a-.
–
Use a small screwdriver -3- to
raise the cover of battery compartment
-2--arrow b-.
  ...
Introduction
This chapter contains information on the following subjects:
→ Opening or closing the windows electrically  
→ Electric windows – functions  
→ Roll-back function for the electric windows  
Additional information and warnings:
Volkswagen information system â ...
Removing and installing Denso heat exchanger, LHD vehicles
Special tools and workshop equipment
required
Drip tray for workshop hoist -VAS 6208-
Hose clamps up to 25 mm -3094-
...