They are the most common Benz here apart from C-Classes and S-Classes. They can easily be recognized with their headlights.
The first time I drive one was during rain. Being the first time driving a brand new Merc proved too much for me as I was shocked and hoped that I didn't crash it. It scared me off when the wiper automatically wipes the drizzles from the rain. However, that didn't stop me from playing with all the equipments and buttons on the dashboard. Guess what I found? The headlights switch, which means the high beam is fully under the control of my left hand. And guess what it can do? From the reflection I saw on a signboard 300 (maybe more) yards away I can conclude that the headlights can be used to kill vampires. It is virtually day on the spot where the light touches. It is that powerful. Maybe this was the reason The Cullens have an S55 AMG in their garage. Other things to notice was the gear changes. Being in a car with this calibre (the second Mercedes I've ever driven), I didn't expect to feel the gear changes. It was like a moment when you caught someone respectable sneezes due to sickness every few seconds.
After a few drives, I got the hang of it. Effy gear changes is expectable when the Sport Mode is on. With this mode on, the car wouldn't change gear until it reaches 4000 rpm. By that time, you are travelling too fast. Comfort Mode (indicated with the letter C placed near the gear lever) changes gear too often that sometimes you are travelling at 60 kmh in fifth gear. And sometimes you get into hard corners in third gear, but the car could not provide you enough power when you want to exit the road deviation. It is also the same during take off. The system starts the journey from gear 2, not gear 1. So it is expectable to lose a drag race when the Comfort Mode is monitoring the car dynamics.
Interior is really what you'd expect from a Benz. Whether you are in a C or in an SLS you'd know the design cues had been not much different.
Pro: The Kompressor, technologies (such as rain-sensing wiper)
Cons: Too much buttons (more than 90 in fact from the drivers' sight alone)