Serviced & inspection ... The Mercedes-Benz E-Class cars were re-engineered from the ground up for the 2003 model year, and 2004 brings a vast expansion of the model line. Mercedes has redone its worldwide best-selling car with loads of new technology to go with its athletic new looks and much sharper, sportier driving dynamics. It's more like a BMW than ever before, but every inch a Mercedes-Benz. The E-Class includes the V6-powered E320 sedan Though it looks sportier, the new Mercedes-Benz E-Class is slightly larger than the pre-2003 models. It's about an inch longer in wheelbase and overall length and a half-inch taller in overall height than the 2002 model. It's also 50-150 pounds heavier, depending on model, given more standard equipment and improved crash protection. The E-Class is the first Mercedes to use aluminum body components extensively, starting with the hood, front fenders, trunk lid, front crossmember and front subframe, 10 percent by weight, with 37 percent of the car made up of high-strength steel, almost twice as much as before. The four-headlight theme introduced on the previous E-Class, now the standard at Mercedes, has been refined in the new car. The new front end is lower and is more steeply raked. The design produces a class-leading 0.27 coefficient of drag (minimizing wind noise and maximizing fuel economy), but the E55 AMG offers slightly more drag, if you can call 0.28 drag, with its extra body add-ons.