right next to the batter, should be attached at the back end of it
under neath the fuse bank of the underbonnet fuse box!
normally glow plugs are used on an IDi[ Indirect Injection] diesel engine. most peugeot 206 vehicles have an HDi engine[ Peugeot's nomenclature for Commonrail Direct injection]. hence there will be no glow plugs in those 206 vehicles. Some of the base model 206 from the first few years shipped with the non-HDi DW8 engine - which do have glow plugs. Check which model you have. If it's 1.9, then its the DW8. Else it is probably an HDi. Replace quickly if they start to fail.
0.9mm
I would suggest that as you are asking this question, you have a cigarette lighter-less 206 or have seen a few around. The simple answer is no, not all 206's have cigarette lighters. They do have a plug behing the blanking plate that a peugeot cigarette lighter will plug into, or you can easily (and cheaply) fit a universal aftermarket one with a hole saw and some crimp connectors. Some are also supplied with the socket but not the actual insertable plug (the bit that gets hot) in which case you can get one from most reputable breakers yards.
under the ecu
When do change cam belt on peugeot 206 180 gti
size 20
0.9mm
1.0 mm
front wiper relay
There is no fuse for the O2 sensor.