HELP....Radio "service" mode settings and functions

[Peter D]

From reading previous posts in this section, I have been able to put my radio (2004, X5, 3.0) in the "Service" mode.

Can someone give me an explanation of what the varied settings in this mode are for and what the factory defaults are..
I read out in order on the NAV screen in the service mode:
Serial Number = 41626046
Software = 18-03 88
GAL = 5
FM (varied station info)
DSP = 0 (no dsp in vehicle)
TP Volume = 0
Area = is obviously country
AF = Man

My concern is GAL, AF and TP, what do they do and how do I set them. I beleive GAL is for sound ambient level sensing for the radio volume but don't know which way to adjust +/- =??. TP, AF????

Another qusetion is can the radio be programed to stay in a particuler search mode, or manual tune mode. When I select these I can "search sensitive" with the < > keys as long as I'm actively searching but then it defaults to the station up / down mode, same with manual tuning. I can manual tune for as long as I turn the knob but stop to listen for 10 seconds and it defaluts. This a pain in the A.. on a trip, try dialing around to find a RED SOX game.

I've read the book and am either missing something (aka: stupid), this is normal, or theres something wrong with the radio module.

Help appreciated......