Comfort Drive, in laymen's terms, is a super-power steering device. You can steer a 50K lb. motorhome with one finger and no effort! But, it's more than that. It is constantly calibrating road conditions so that it automatically adjusts to wind and the crown of the road. That means you do not have to keep pressure on the steering wheel to keep the motorhome from drifting away from the crown of the road or the wind.
The calibrations are what really makes it a pleasure to drive down the highway. You can notice strong wind gusts, but nothing like regular steering. The steering wheel will be slightly turned to the left to compensate for road crown. This enables you to basically steer with one hand. I can actually drive 10 or 12 hours in a day if I want and not be worn out and my neck and back killing me!
It's funny, when we unhook the car, it feels like the power steering has gone out! The motorhome is that much easier to drive than the car. Same thing when we stop and get out on a windy day--It's like Whoa! I didn't realize there was a 30 or 40 mile crosswind!
It truly is incredible. I don't know how expensive it is since it's never been an option, but I know they bring big premiums over the Newmars that don't have it. I'm betting it's around $10K-$15K new. It can't be retrofitted. However, it's hard to put a price on the enjoyment and comfort you experience going down the road. Lee