New here with an 06 2.0tfsi s-line SE avant. Lovely car so far, decided it needs a few extras.
As its the mrs car I wanted bluetooth, so i bought a kit from ebay and have wired it in today. I only have the concert radio, so i used a few mini blade connectors to connect onto the Tel plug pins.
I used the 12v and earth and k-line from the power plug to the radio (was permanent 12v a mistake?) which i tapped into with heatshrink terminals.
Then with mini spade terminals joined the NF wires and phone mute onto the tel socket.
With VCDS I changed coding in the radio, MFSW, instrument and Tel. I changed the tel to comms over k-line rather than CAN, i have left the CAN wires disconnected as I didnt think they were needed on my early A4?
Now I have a few issues. The Tel module 77 wouldnt communicate on VCDS for ages, eventually it did when i added the CAN lines, as it was a used module i changed it to K and it seemed to work. I could connect my phone to it and it did work, but the MFSW mode button doesnt do anything, I cant answer calls on the wheel or look through contacts etc. In tel I have a DTC for no comms from SCCM, which I guess is the MFSW in VCDS?
Anyway, coding seems to be correct, I changed some numbers to allow for phone and voice control in all units, but still no buttons working. Now I can't get my phone to connect to the bluetooth, just scans and nothing.
Have I done something silly and missing the obvious? I'm a Merc commercial tech so fairly technically savvy just not too clued up on the VCDS systems.
Any help massively appreciated!