When I noticed my right rear tire was balled amount to the steal belts, I knew there was a problem. The car only had 20K on it. I went to put the spare on. When removing the tire, up on factory jack, and bolts removed. I noticed that as much as I jacked the car up the tire would not come all the way off the ground. When I finally got the tire free, the brake rotor shot down on the bottom of the rim, shot the car up in the air, and jack knocked over. It was like the spring came complete uncompressed and shot the car up. When it came down, my hand was wedge between the tire and car. I was able to get it out quickly, but I could not get the car jack up all the way to get the tire off. I have to get a road side service to come with a longer jack to put under the suspension, jack it up to compress the suspension. Then I got the tire off. This all happened in my garage with a level concrete floor. I read the manual several time to make sure I did the tire change correctly, and I did. The van only had 20K miles. I'm still confused how the tire end up like it did. I took it to my nearest Mercedes dealership. They told me nothing was broken on the rear suspension. They couldn't explain the issue I had changing the tire, but they had seen the tire wear issue several times on these vans. They said the alignment was way out. I use this vehicle for my video production business. After this accident, I had the car weighted on a cat scale, loaded and unloaded. I haul around 1300 pounds of gear. Its rated for 1874 pound of cargo, and that with two rows of seats that weigh 150 pounds each that I have removed from the car. I put new tires on the car and had it aligned with all the weight I carry. It was fine for about a 1000 miles. I just don't feel safe. It feels like I've max the suspension out. I feel the suspension on this car it not right for the weight is says it can handle

- Columbia, SC, USA