Thanks for your quick reply.
Can i set it as always on?
I am from singapore and ojr local audi agent is very stick about warranty.
Added in wire and button will sure void my warranty which i am trying to avoid.
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Yes you can, it’s on until you turn it off.
Will your local Audi install it for you? If you have it programmed? They shouldn’t be that picky but I would ask them straight.