they may be required to know how to use computers, but ask your friend if the mechanics understand mechanical systems as well as computers.
often the computer systems (i've programmed a few, but not on the automotive field) will collect information from various sensors and other embedded systems and then report. usually the systems force a step 1, step 2, step 3, ... cookbook approach to problem resolution. and workers are not expected to do anything but follow the steps.
it could be the automotive field is advanced in this respect. but across the board? i have my doubts that computers are *enabling* workers to better master their craft. "intellectual demands"? shrug ....
Les