Judging by how close those base cabinets look to be to the side of the car, I think you'll hate detailing/wrenching on that side. If you can move your bench area to in front or behind the car, you'd have more space to work without banging into your cabinets.
+1 to what Vinci says.
I really like your level of planning!! Nice progress!! Additional comments for my $0.02 worth:
1) I'm assuming the tall cabinets currently at the end of the garage are not as deep as the base cabinets so move the tall cabinets to side of garage near O/H door. Leave areas along each side of car clear.
2) Move base cabinets/workbench to front end of garage.
3) Eliminate the open shelves along the one wall. At a height of only 66" they will be perpetual head-knockers. Maybe place them above the wall cabinets (ala soffet cabinets) or raise them so you have at least 6'-6" clear under the bottom shelf.
4) Add doors to any open shelving as already suggested. Looks much cleaner and IS much cleaner.
5) Why are you leaving 6" space under the base cabinets and tall cabinets? It will just collect dirt, trash, and creepy-crawlies and you are wasting 6" of usable storage height. I don't think you can afford to lose this space.
6) Go and open both of the car doors and measure width of car + open doors. I think you will find that 16' is fairly narrow for working on a car, but you can make it work if you continue with your detail planning. Rework your design model using your car with its doors open. Also, block in dummy-spaces for work areas/zones to better allocate your available garage area.
7) Go UP with as much storage as possible. Maybe inconvenient, but you need to get to those Christmas decorations only once per year!
