Today I drove to work listening to HD Radio (worth the price of upgrade from 5000>6100!), and got frustrated that holding down the L or R button on my steering wheel did not go to previous or next stations. I thought for sure something was broken.

 

So I switched to USB1/2 and found that tapping the L or R button worked fine going to previous or next song.

 

So out of curiosity I switched back to HD Radio and tried tapping the L or R button to see if a miracle happened.

 

Low and behold, yes, it worked!

 

No change was made to the PAD RP4-HD11. Nada. Zilch.

 

Since moving to the 6100. tapping the L or R button works with both HD Radio and USB1/2 (and presumably with CD).

 

Little surprises. Wow.

 

Don