The back end of the tires is very low to the car,(the front is higher) is this

Hello, These cars are meant to self level themselves, however, if you notice it is sitting differently where you normally park it, you probably have a leak in the rear air suspension lines or springs, or there is a clog in the system. Likely you have a leak, and this could mean replacing a line, a fitting, or even a spring. Let me know if I missed anything, or if you would like additional information. Otherwise, here is a link to certified services in your area: http://repairpal.com/mercedes-benz-within-10-miles-of-chattanooga-tennessee-37421

Could be a leak in the ABC system. An MB specialty shop or dealer will have the right computer to check and read suspension fault codes. Anything from a leak strut to a ABC pump issue can cause this. Try a shop around you! http://repairpal.com/mercedes-benz-within-10-miles-of-chattanooga-tennessee-37421