You'd better trade in that Merc of yours on an amphibious model, David, if you intend driving over to Sydney LOL! Either that, or have a propeller fitted!!!
No prob! I'll replace the tires with a couple of floats, strap a jet engine on the back and I'll see ya in a couple of hours!
Wait a minute! I'm a gay man and I'm not mechanically inclined. Forget it. I'd sink like a stone in the Pacific for sure....and THAT'S assuming I made it out of Indianapolis.... or my neighborhood..... or my driveway.