The V12 benzs make GREAT daily drivers. Very confortable, relaxing cars.
The cars are INSANELY powerful. The 600s are rated at just under 500 hp from the factory, but in truth the engines are the EXACT same ones as found in the Maybach and make slightly more then 542hp and 620 ft-lbs due to the less restrictive exhaust then the Maybach (as confirmed by dyno testing of cars regularly putting around 460hp to the rear wheels). STOCK 600s will pull 1/4 miles in the 11s all day long on stock rubber. The Renntech chip
alone will bump power to 625hp and over 700 ft-lbs, add a free flowing exhaust and you will be up past 650hp where the only real limit becomes the trany (need to get it beefed up if you want to go past 800 ft-lbs IIRC.
600s are also 'cheap' on the used market...
you can buy a one year old 600 with under 5k miles for about the price of the entry level model with basic options.
The 65s are even more insane...most agree the factory figures are very 'conservative,' and the cars performance shows:
A renntech chipped SL65 with exhaust on slicks ran low 11s all day long (there is a video on putfile of it). In fact, the track marshels warned the driver to slow down, as the car lacked a roll cage. Even tapping the brakes at the end, the car would run mid 11s runs one after and other. A similar car broke into the
high 10s as well.
Now the negative issues:
1. Gas mileage in the city (with lots of stop and go) with even a light foot is 6-8mpg, though, on the highway you can get up to 20 if you are not aggressive with the gas pedal and cruising at 75-80. (At worst you will get 15mpg or so, with 14s if you are REALLY being liberal in its application)
2. Under-engineered (for a German car at least). Not to say they are bad, in fact the cars have lots of great concepts but none of them are taken to the level of execution that used to be seen in the late 90s S classes or BMW 7s.
Some cases in point:
The windows are one touch down for both front and rear quarter...and the front windows are one touch up as well...BUT the rear quarter windows are not one touch up...something that when you are expecting otherwise is just plain weird.
The cooling seats don't really cool that well...at all, as the are only pushing air upwards (not even cooled air at that, as their is no cooling elements in the seats). You cannot feel the cooling effect if you have any 'normal' clothing on, only if its the thinnest (like shorts or a light cotten shirt)