Sigma SG800 Transponder Immob System

[RichieSounds 0]

My car has this SG800 Transponder Immobiliser System + VW Logic 800 Code hopping Alarm Immobiliser.

 

I read that from the 2 leaflets (instructions) in the glove box. I've found both control units: The Logic 800 system control unit is just below the fuse panel. The SG800 control unit is located just to the left of the drivers footwell.

 

It seems over-kill to have 2 devices behaving as immobilisers doesn't it?

 

The SG800 requires I carry these transponder gadgets around on my keys which look like sepositories! Can I uninstall it?

[RichieSounds 0]

Apparently the Logic 800 is actually a Sigma SG2 I think. So is it still necessary to have both systems installed?

 

Also, I'm trying to work out whether I can get total closure working - anyone know if this can be set up or should work with this system?