Audi Q5 Key Fob Battery Replacement (2016 - 2022) FobBattery. 38K views 6 months ago. Audi A6 Key FOB Battery Change, detailed video. Battery used CR2032. Audi A6 2.0 TDI 10/2006 c6 change battery - 16-03-2014, 06:33 AM. Dear all, I have an AUDI A6 C6 2.0 TDI Multritronic 10/2006. In the last start I observed that the power of battery is too low, also on driving I observed some strange things, on gear box, on power etc. Before starting, we will have to press the button on the top of the key of our Audi A6. So let's start by extracting and removing the physical key from inside the electronic key. After that, we will have to go to disengage and remove the battery section of the key, and we will have reached the dead battery. What is correct battery for the key fob? A6 / S6 (C6 Platform) Discussion - A6 Key Fob Battery Replacement - Hey guys, Which battery to purchase as replacement for the key fob? Would this battery works? battery_4f67feef892daab90fff8b7b85d3627c6180857c.jpg Yl8Jg.