How do u go about removing it? Is it hard to do? Could someone please give me step 2 step ways of removing it? I hear the gas is harmful.

Cheers

 

Before removing the system, be aware that the gas "supposed" to be removed/drained by an air con specialist as you can be fined up to £2000.00 if caught draining the system to atmosphere.
Once this is done, then the system is fairly easy to remove, as the pipework can be removed up to the bulkhead. its your option if you then want to remove the heater unit inside and take out the radiator, but simpler to leave in situ, not going to do any harm,plus leaves a big hole in the trunking if you do without replacing the original "non aircon" casings back in.