The M.A.D. Mobile is Dr. Claw's personal vehicle that he uses to do his evil-bidding, like eliminating Inspector Gadget, etc. It is also often used as an escape vehicle at the end of most episodes when M.A.D. agents get arrested.
This vehicle can transform into 3 different modes:
Claw uses this mode to keep up with the Gadgetmobile, but the Gadgetmobile is a little bit faster. Claw also uses this mode to fly up in to space.
Claw often uses this mode to hide underwater and carry out his evil schemes from there.