The nav volume in my 06 SL500 is barely audible. I have it set to interrupt the radio completely. However, even then I can barely hear the Nav directions with the top and windows up.

Is there any way to turn the nav volume up???

 

Turn the volume up when the nav is speaking. It will stay on that setting as long as you catch it when it's talking. Use the RPT function if you have to get it to repeat the last instruction.

 

Thank you very much for responding.

I actually accidentally figured that out today. I couldn't find anything in either manual for it so I was stumped.