Citroen Xsara Picasso spare wheel location and release 

There is no jack with them too

Best to use a wide flathead screwdriver and turn. The spare can go in the boot as its a pain to put back in that tyre well

The tool or key is normally in the foot compartment behind the driver seat. If not just use a wide chisel to turn

The battery's hidden away too!

Where can I find the lock nut for changing a Tyre?

@@ionutpostolachi3590 Normally with the car wheelkit which is in the footwell of the rear passenger seats

jack the car up at the rear and try and manually lift the rod up by hand - it may give without the turn being required on the slotted screw

@@user-qb2cy2lm7h WD40

Hi, yes sure, I put mine straight back on and if needs be, just turn it once or twice in the correct direction to tighten - it stays on tight regardless if Im honest but best to be safe.