Car PSU proposal -- need design critique

Here's what I've come up with for the accessory line. Have a look and tell me if it makes sense.

Here's the circuit sim code:

$ 1 5.0E-6 10.20027730826997 50 5.0 43
172 96 256 96 224 0 6 13.799999999999997 30.0 -30.0 0.0 0.5 Voltage
d 112 256 160 256 1 0.805904783
r 176 256 224 256 0 1000.0
z 240 304 240 256 1 0.8059 15.0
l 256 256 304 256 0 1.0E-6 1.2952880904054838E-4
c 320 256 320 304 0 1.0E-6 13.082409712790922
w 96 256 112 256 0
w 160 256 176 256 0
w 224 256 240 256 0
w 240 256 256 256 0
w 304 256 320 256 0
g 240 320 240 336 0
g 320 304 320 320 0
w 240 304 240 320 0
f 512 256 560 256 0 4.0
w 512 176 512 144 0
r 416 256 480 256 0 1000.0
R 512 144 480 144 0 0 40.0 5.0 0.0 0.0 0.5
w 320 256 352 256 0
w 480 256 512 256 0
g 560 320 560 336 0
w 560 272 560 320 0
r 512 272 512 320 0 100000.0
w 512 320 560 320 0
w 512 272 512 256 0
f 560 192 512 192 1 1.5
O 400 208 352 208 0
r 512 144 560 144 0 100000.0
w 560 144 560 192 0
s 352 256 416 256 0 0 false
w 560 192 560 240 0
r 432 176 432 128 0 10000.0
w 512 208 432 208 0
w 432 208 432 176 0
w 432 208 400 208 0
g 432 128 432 112 0
o 0 64 0 35 40.0 7.8125E-4 0 -1
o 5 64 0 35 20.0 9.765625E-5 1 -1
o 32 64 0 35 5.0 7.8125E-4 2 -1

... and the schematic is attached.