Bad Attitude-Ruth Service Department

I went the the Mercedes Benz dealership to try and get clarity on a warranty query. Ruth at the Service department was very rude and dismissive. She would not even give me an opportunity to clearly state my case. Instead she continuously interrupted me even when I repeatedly asked her to give me a chance to have my say. She told me she did not care about the warranty booklet and her word was final. She was rude and shouted at me in front of other customers. She abruptly stood up and went into the workshop to apparently call the Team Leader. The entire reception area could hear her shouting and cursing from the workshop. It felt like I was committing a cardinal sin by even questioning the terms of the warranty. Ali Khan the team leader came and addressed my query in a professional and friendly manner. This incident left me humiliated and I doubt if I will ever bring in my car for service nor purchase another car at the same dealership. This has also left a sour taste in my mouth regarding the Mercedes brand which was a favorite with my family and friends until today.