I am in the process of fitting cruise control to my ZS180.
The 4 pot K and the T engined cars use a cable system for cruise control, the KV6 ZS, ZT, R45, R75 and Freelander use a pnumatic system.
The main componnets are
engine bay
1) Actuator (mounts on the unexplained bracket on the throttle body)
2) Actuator pump
controls
1) Steering wheel paddle switches
2) Dash switch
hidden bits
1) cruise ECU
2) KV6 interface
3) brake peddle switch
4) clutch peddle switch
I have most of these bits togeather and am now working on how to connect them as only the top of the range R45 KV6 2.0 (which I understand only came as an auto) had cruise control as standard and they use a different facia and main loom and some of my parts came from a ZT anyway and they are wired differently!
Acuator bracket.