I would have to say my favorite driving experience with a benz has been getting to ride in my grandpa's 6.9 he had down in newport beach where he used to live.
of course that was many many years ago, and the car was sold years back and he also is no longer with us.
Most recent experiences driving a benz that really made me feel great, the first time I drove my 92 300CE 4 months ago. I had switched from a jeep to the benz. I used to feel bored and depressed when driving the jeep and really only cared about getting to my destination.
With the benz now I smile as I drive, I'm always enjoying every minute of it, and I take longer routes everywhere just so I can drive a bit longer. I even leave earlier to get to my destination so I can take the longer route.
lastly, I really enjoy knowing the car is all mine.