One of the things that is nice is you don't have to be
hooked up to use the database that's in it .
You can cruise it at your leisure .
For instance put in something like RLS (Rain Light Sensor)
in the search box and everything related to the RLS
comes up install procedure with pictures, calibration procedure
schematics etc etc.
The error codes all have english explanations and also
can be dropped into the search box.
Some where near the begining of this thread I think I put
up the links to the manual for ista D.
(bottom of entry 2)