I think its the flash, but thinking of that you could all make it work

say when the phone rings you connect it through the brake light flashing and you could use the other lamps for mood lighting

Also when I look at the 2 vents you could use those to build speakers behind...
And the hole were normally the 2 exhaust pipes come through you can make some sort of 2 beer or whine bottle holder that gives the effect of the exhaust but is functional too in a funny way