The Mercedes ML 550 is of very high quality, I feel comfortable with my family driving in it, and is very reliable. I really like the size, its about perfect for a family of 4, and lots of trunk space for all the sports equipment and groceries. The quality is number one, because I have had nothing break in the 3 years I've owned this pre-owned care. The doors open smoothly and the automated back hatch is really nice, especially when you have kids and your hands are full. All the gauges and signals are still the same color and very clear to read. The only two things I dislike are the cost of maintenance and gas mileage, it eats up a lot of gas and with a small tank, your always at the pump. Overall, this car is a high performance vehicle, picks up fast and goes when you need it too.