Hi, 2006 RL here. Had the same problem with the new nav DVD going into inline diagnostic mode at power up, but the hold-MAP key trick posted here solved that. However, it appears that there is still something wrong. When I do diagnostics on the Navi System - the XM(HIP) and HFL boxes are red - everything else is green. Anyone else experience this?

Two other interesting issues:
1) The sunroof switch no longer auto-opens/auto-closes. The second position forward/close doesn't kick it into auto mode, and it becomes difficult to close now because I have to go forward/backward/forward/backward just the right amount so it seals properly.

2) When pulling the hi-beams lever, they don't stay on. Only way to keep them on is to hold the lever back. I don't think it was always this way, was it? I thought it was a toggle. Pull once for on. Pull again for off.

 

Pulling the lever is for 'flash to pass'.

PUSH the lever forward and it will lock into Highbeams ON.

It is a Honda trait.

 

Gadget - perform these steps to resolve your sunroof issue (it happened to my 05 RL as well):

1. Start the car
2. Press and hold the moonroof switch to the first click and hold until the moonroof opens all the way and you hear the relay "click" - count to 3
3. Press and hold the moonroof switch to the first click and hold until the moonroof closes completely and you hear the relay "click" - count to 3
4. The one touch worked again.

He advised that when the RL senses the battery dropping below a certain level, it begins to "shut down" features it considers non-essentials. I asked him for a list of what the car considers non-essential, but he didnt have it handy at the time.