I recently took my Mercedes to Sam Smith Performance because I was having air suspension problems. The front side drivers side was sagging onto the front driver's side tire. I took my car to Sam Smith Performance and he scanned my car and told me that the car needed a air compressor. I paid him for air compressor repairs and other repairs needed and a few days later, the car start sagging over the front driver side again, indicating to me that repairs wasn't done properly or at all. I took car back to him and he then told me that I needed a driver's side air strut, the one on the car was leaking. I paid him for the air strut suspension repairs and now 3 weeks later the same issue have started again with the car sagging to the driver side tire and now to where the car won't drive, I am now getting the stop, don't drive, car too low. I have paid this man well over $3000 dollars to repair this issue and he basically have lied about the repairs, but charging me as though he has fixed the repairs. A warning to every Mercedes Benz owner, do not take your car to this shop, he is not a Mercedes Benz trained Technician. He rigged my air suspension instead of repairing it, just enough to drive car from his shop, knowingly that he didn't repair it and now I have to get it repaired at a Mercedes Benz shop. To all Mercedes Benz owners, if you value the driving integrity of your Mercedes Benz, you will be wise to take your car to a trained Mercedes-Benz technician, you will save time and money.