you have MK4 as indicated by the 4-1/20, with color monitor, as indicated by the 4-1/20 , and sw version 18, or whatever the 4-1/20 is...

if you can source the part number 01 59 0 141 891 from a dealer (about $10), then you will get the lates sw version 32 for the MK4 on the original disk.

otherwise, you need to find a place that hosts the image and burn it on a slow speed to a CD. the regualr instructions tell you to turn the key to ON and not run the engine - I actually ran engine, just to make sure that the battery does not die on me... it did not affect the updating procedure