z4 bluetooth upgrade with dsp

[VvrooomM]

When I first bought my 2006 Z4MC I retro fitted bluetooth, by adding a ULF, antenna and mic and hacking into the wiring via a telemute harness at the back of the head unit, building a new cable to connect to the ULF in the boot.

All went well once I had got the phone paired except for the fact that I cannot change the call volume and it is incredibly quite, okay if engine not running but useless if it is.

Any ideas where it went wrong, I have searched the web for hours and found nothing.

Thanks

 

[jan_tekin]

Don't quote we on this but i know you can change the volume using nav coder found here.
Once your in a call you should be able to turn the volume up/down using the radio volume tho.

 

[cj10jeeper]

I retrofitted the whole kit some 2 years back on both my X5 and Z4.
Issues I looked into to get sound quality up were:
DSP amp on the X5
upgraded mike on the Z4
Later column top mike mount
location of the bluetooth antennae

On the Z4 I broke into the circuit in the rear left wher the harness comes through the rear firewall. Never touched the headunit

Both are perfect

I'm sure you've seen it but bimmernav.com is a great source of info

 

[VvrooomM]

can turn volume up before I start a call but not when in it, or when somebody calls me???

 

[cj10jeeper]

I can certainly change the volume 'in call'