Rear Suspension problems of the 2003 Mercedes Benz S Class

Incident one: 1. While driving in atlanta, GA in February of 2007. The front airmatic suspension failed while crossing an "inactive" railroad track. Just imagine if it was active. Mercedes-benz towed the car and replaced the defect. 2. A few days ago, I'm driving on a 40 mph speed limit road and my car starts to lower. Again. I was lucky that no one was behind me, otherwise it could have had a different outcome. How many times will someone need to report this "safety hazard" to the national highway and traffic safety administration. Does someone need to die, in order to be heard? please help me. I cannot afford to have the car I purchased, as the salesman said, "the safest car on the road," become the reason for serious injury or even death to me and others. Thank you, I hope you'll contact me within a reasonable amount of time. We need to be heard. We want you to do something, because it will make us feel that you genuinely car about listening and creating action on these complaints. What does it cost you to recall something? I know what it'll cost me or the public if you don't.