While this car has a heavy build, I think it is in the heaviness that drivers find a sense of safety. Mercedes-Benz is known to be a luxury brand and with it I feel like people want to get the most for their money. Not only are consumers getting the brand, I think the solid and heavy build of the car lends to a feeling of being safe while driving as well. This car has over 120,000 miles on it but still drives very smoothly. However, I feel like the heavy build of the car does impact its performance on the road. I have driven lighter cars that handle better. I have experienced no issues with sound quality or electric problems while driving the car. Since this is an older car the look is a little outdated, but not so much for the year that it was made. I wouldn't say it's an incredibly practical car because it is a little bigger than an average sedan and drives a little slower because it is so heavy. It is however very comfortable and the leather and interior in general have maintained a fresh look over the past 14 years. Because it is an 03 model I would not say it is fuel efficient. This car has a lot of little compartments in the front side of the car, including the dashboard area as well as the center console. It's great for storing things.