So or some weird reason my 2003 a6 3.0 started flashing a few lights

1.- Is the one on the picture it seems like a fog light

and second
2.- My tiptronic was not working at all I took it to my mechanic and he told me that it was having problems with the connection somewhere under the gear box which he fix by sealing the connection or something like that however now is flashing the lights from parking to D and even when the manual is on is not showing me the gears. This problems is sporadic and not always happening for instance this morning was working fine however a few hours later again not working.

According to my mechanic the transmission is perfectly fine and doesn't seem to have any problems.

I will take it in again to see wahts the deal but i need to have an a idea of whats going on.

Is it serious?
what can I do about this?

I did replace the battery could it be that it need to be reprogrammed by the dealer?

Any advice is appreciated

Thanks