Driving in snow

[geoff]

Earlier I asked about snow chains for my Cayenne, but after driving around in the snow for a few days now, it's clear the Cayenne drives very well in the snow, no chains required. Before heading to the snow, my service adviser at the dealer said to just push the left rocker switch forward twice and I would be good to go. The first time I push it forward, the low range off-road driving program is engaged. The second time I push the rocker switch forward, the center differential lock is engaged.

The owner's manual talks about locking the rear differential in low range after locking the center differential, but doesn't describe how to accomplish it. I tried pushing the rocker switch forward another time, and it didn't seem to do anything. No lights lit up. What is the trick to get the rear differential to lock?

[geoff]

Like a complete dope, I failed to do the obvious and didn't search this forum to see if the topic was already answered (it was several times)! The locking rear differential is only available as an option as part of the Offroad Technology Package, a $2,600+ option. The owner's manual doesn't mention this, and the light is there but doesn't function, hence the confusion.