Originally posted by ShobThaBob
Crap.
Nice post ShobThaBob!

Cretin.
Rear fog lights have been mandatory on all cars in the UK since 1978. It's a high-intensity light at least the same brightness as a brake light (i.e. 21W), and there must be at least one of them. Many manufacturers have experimented with the rear fog light, to try to find the best way to make it distinctive as such.
Since they are not mandatory in Japan, it's an easy way to spot a Japanese grey import. To get the car through SVA (Single Vehicle Approval), it has to have a rear fog light fitted to it, normally done by the importer, who buys a £15 bolt-on unit and attaches it to the rear valance.
However, drivers seem to have difficulty deciding when to use their rear fog(s). The Highway Code is quite clear on the matter, stating that they should be used when visibility is <100m. Ford didn't help with the MkIII Fiesta, by siting the rear fog switch right next to the rear screen heater (using the same button), somewhere in the depths of the centre console. This would mean that many Fiestas would rumble around with their fog lights on, reflecting the blind groping of the driver. One particular issue with drivers is switching the light off again. They'll come out of the fog and drive another 200 miles before switching the rear fog light off.
Then, on the other hand, you'll find the moron in the silver car toling along in thick fog with no lights on at all...
You will probably find that European-built cars will have rear fogs, mainly because it costs less to fit them to the cars in all markets than it does to engineer them out. If you want to find the switch, look for a picture of a bulb (a hemisphere usually) with three straight horizontal lines coming out of it, and a single vertical line (may be zig-zagged) intersecting those three lines.