First link of this thread:
http://www.siegenthaler.co.nz/NavCoder/

You need to follow the instructions and install the DLL files before you can get it to run...

To KiwiJochen, question please:

Is NavCoder capable of adjusting the audio mixing volume from different audio sources?

My issue is - ever since I removed the stock DSP amp and upgraded my amp to a more powerful amp -the Nav volume is now too loud. I have already set the nav volume to its bare minimum but it is still too loud compared to other audio sources (CD, AM, FM, etc.)

Thanks in advance.

BTW, I have an E39 M5.

Dan

That function doesn't exist in the radio hardware, sorry.

Add a good old fashioned potentiometer to the nav audio lines, and adjust the level to what you like.

Thanks for the info and prompt reply!

Can you kindly send me a link showing which wires I need to tap to for the Nav audio line out?

And what value potentiometer you recommend I should use?

Many many thanks!

Dan

Easy: there is a twsted pair of wires on the nav blue plug. Normally blue/ brown and blue/red. On some cars yellow/brown & yellow/red

red stripe is signal
brown stripe is ground

Fit around a 1 to 10k-Ohm potentiometer

solder one end of pot to brown stripe wire
Cut red stripe wire, solder nav end to other side of pot
Solder radio module end to wiper of pot.

Excellent info. Thank you!

Wow, you folks are just like the nice people we have on our M5board.
Very helpful!

Many many thanks!!!!!!!!

I will order the NavCoder next week so I can turn off the light bulb fault messages on my M5 and my wife's 330ci (I converted my license plate bulbs and 3rd brake light bulbs to LED's.)

Thank you folks again for everything.

Dan

Where did you adjust the volume? Adjusting it via Settings-menu is not enough, you need to adjust it via Info-button's nav-min adjustment. If you already did that, then using a potentiometer or fixed resistors is the way to go.

Hi TJJ,

Yes, I have done both already.

1) Adjusted to bare minimum via Nav Volume settings. Done.
2) Adjusted volume via Radio Service Mode Info Button. Done.

Still too loud : (

Looks like potentiometer is the way to go.

Thanks.

Dan