Horrible experience with the service agents. Found...

Horrible experience with the service agents. Found similar comments in other reviews so there is a pattern. Had a slow air leak in a tire of my GLE350. Brought the car in to the service for a quick check. I did not have an appointment. The service people (an asian girl and an African American guy) acted very unprofessional and somewhat rude. Both didn't ask many questions. The asian girl checked the pressure written on the gas gap and started to question me "who put so much pressure in the car". I don't think 40psi is "so much pressure" to start with. And it has nothing to do with what to do with the leak. The black guy was quiet the whole time without letting me know what he's trying to do. I tried to establish eye contact and he never even looked back. Although when he's checking this and that he did greeted another client in another car who just drove in. I'm not sure it's because the other driver is a white guy and I'm not, or that's an acquainted client that he knew before. Either way he remained quiet the whole time when working on my car. At the end I noticed that he started to put air in the leaking car, so I was guessing he wanted me to go elsewhere. I asked "what's your plan?", and he replied "my plan is to air it up and see if it leaks again. If it does, you want to go get it check at discount [tire]". I actually checked the leak the night before but he never even tried to get that information. I guess he was just planning to put air in it and tell me "go elsewhere". I found this whole process very disturbing the way they treat a customer with this coldness. The least they could do is to say "we don't know the issue. and since you don't have an appointment unfortunately we don't have the bandwidth to work on this. But you could check with other tire shop" in a polite way. For customer service agent, it's important to keep your client updated what and how you are trying work on the situation. Being silent and looking all arrogant and possibly racist is a very low bar for a place like Mercedes. My lease of this GLE is coming to an end and I was actually planning to take a look at the newer version. This whole service process made me so uncomfortable I just left directly feeling "not being wanted" and "in the way". This is a horrible experience! Took the car later to another shop and tire was replaced for free from warranty.