I am retired and have a 2013 Mercedes sls gt amg coupe. In the past I have primarily Mercedes SLs, Porsche 911s, Jaguars, & Corvettes. This car is my everyday driver. I chose it for a number of reasons. 1st, as a retiree who plays golf alot and plays recripicals in the summer, the car must hold a large golf bag in the trunk .. and it does. Secondly, it needs to very reliable and cost effective to maintain ... it is. In fact it is so reliable, the extended warrenty from factory 4 years to 7 years was only an additional $3500! Thirdly, it had to be beautiful and the Gullwing is. By the way, my wife is 70, 5'2" and has no trouble with the door.
We have owned the 2013 sls gt coupe 4 years now. We have not had even one issue in the last three years. We bought the extended 7 year warranty and to date, have not used it. The maintenance costs are around 200 a year but around 1500 at year 4. Not a rattle. Wonderful car. Gone up in value. Bought 6 months old and can now sell for more than I paid. Closing door not a problem .... Even 5'2" wife has no issue with gullwing door.