I'be decided to install a on-glass antenna (Laser 472) for my UHF 2-way for use while driving around town instead of leaving the large antenna poking out the front of the D4. Initially I planned to stick the antenna on the windscreen (passanger side) but now am thinking about placing it on the passanger rear quarter window between two of the LR antenna. The questions I have and hopefully someone out there has a better understanding of these things than I do can shed some light are:

Firstly there are 3 existing LR on-glass antenna on each of the rear quarter windows and on my standard MY12 HSE (no TV, digital radio etc) only the centre antenna on each side is connected. I'm guessing that the shorter one on the pasanger side is for FM and the longer one on the driver side is AM. Is this correct? Does anyone actually know what all these antenna are for?

Secondly, is ther any issue with placing a UHF 2-way on-glass antenna between these?

Lastly, I do have factory privacy glass (Sundym) on the glass rear of the B pillar. Will this cause any issues?

Look forward to any feedback. I'll also post this in the D4 forum.