There are several cabin temperature control systems fitted to the various models.
What is "Climate Control" (on a P reg, 1996 XM TD 2.5) as opposed to Air Conditioning?
There were several 'climate control' systems fitted to the XM. In fact, IIRC the manual refers to them all as 'climate control'. Onseries 1 there was:
2) Semi-auto (looks very similar to manual)
3) Full auto
1.5) Later series 1 also came with manual but separate for driver and passenger side.