Bind
Vehicle Movement -
-- Car Forward to something other than default w (example e)
-- Car Fast Forward to something other than default (example a)
-- Car Slow Forward to something other than default (example z)
Enter a vehicle as a commander (with an AI driver) and issue a Car Slow Forward command. Nothing will happen. Now try CTL+w and it will work. Rebind a command to SHF+w and notice that it does not issue the command "Fast" to the driver.