I had that (among other things) coming up on my '03 since I bought it a couple of weeks ago from the dealer. Think that's part of why I gota pretty (what I think/hope was)good dealfor an '03 RR. I found a 5-amp fuse in slot 37 of the glove box fuse panel, putting the x-fer case into neutral. Funny thing isthat it ran for me about a week before I found that, just gave me ' SELECT NEUTRAL' and 'SLOW DOWN' all the time. That isuntil aloose battery connection (also courtesy of the dealer) completely shut it down, & really DID put the x-fer case in nuetral.
Not that this would be your problem, since no detailer would screw around with the fuse box at all.
If this detailer DID use enough cleaning solution to short out a range selection or DHC switch, I'd be worried about the wood venier getting damaged too. That's like wood floors getting wet. Not too pretty.
Hope it's worked out by now.
Just sayin'....