Mercedes Benz Fountains Lack of Service/ Quality

A person thinks for peace of mind go to the approved agent, you well get well trained mechanics. This is not the case with Mercedes Benz (MB) Fountains. Took my vehicle to MB Fountains due to a noise coming from the rear wheel. Cost R 2850 Certain days the noise would be there other days the noise would be less. Though the mechanics at MB know what they are doing and that the noise will go away. Phoned the MB service agent a week or two later and advised that the noise is back. The service advisor asked that I book the vehicle back in. I said I have a problem as I work at Lanseria and I cannot take another days leave. My problem was the following: -Additional MB charges in trying to fix my vehicle.-I will lose another days leave. As time went on the problem got worse and we cannot sit without the vehicle. Had a look myself during a weekend. I found that the spring that holds the hand brake pad in place was broken. Replaced the spring (cost R 4.00) at MB and no more noise. A few months later and all is still well. Contacted the MB Fountains saying that they charged for something they never fixed. Received a letter stating that the invoice stands.