Short story for you,
I'm a part time fireman in Essex, close to the M11, car fires are popular round here, had a call yesterday to car fire in the next village, we pulled up behind a lovely fully restored series 3, smoke coming from inside no flames so not major, the sub got me to have a look, one of the other lads is trying desperately to find the bonnet catch "in the cab" to disconnect the battery ,soon put him right on this, anyway traced the smoke to a large mess of melted plastic in the dashboard.
The lady driver then tells us the CD player had been fitted by her son earlier that day along with a cigarette lighter, it amazed me how he done this, he had taken the positive from the auxiliary power point into he dashboard, connected this to the lighter, from this piggy backed off to the nice shiny CD player and changer, this was all done with what looked like 5 amp wire not a fuse in sight, we pulled all the melted wiring out, suggested she have it wired in correctly perhaps by someone who knows what they are doing and send her on her way.
Good job this wasn't on the drive overnight or another Landy could have been on the scrapheap.