Very disappointing experience with the Service Dep...

Very disappointing experience with the Service Department! They should be ashamed of themselves charging $165.00 to "look at" my car. They came back telling me what I had said to them in the beginning - it needs ball joints and control arm bushings. What I asked for was, the cause of the car not having an even ride-height. It looks like it's doing a nose dive! I put new factory springs on the car to try and fix, but it did not correct the issue. I 'thought' being MERCEDES BENZ, they could tell me specifically what needs to be done to correct the ride height, which in turn would fix the camber on the front. I know it needs the ball joints, but this won't magically raise the car! They agree with my assessment, but have no answer. They try to sell me on five-thousand dollars worth of repairs that don't address the problem I'm there to address. I politely paid after expressing my dissatisfaction. Next I'll be filing with the better business bureau. If they couldn't find the problem I asked them to identify - there shouldn't be a charge!! They ADMIT the problem exists, but offer no solution. A total scam! I'll never go back to them. Not ever.