I stopped by the service, they could not replace it under warranty. As I understand it, there is no spare parts warehouse for Mercedes in Turkey, they are ordered from a warehouse in Germany. Mercedes Me does not work in Turkey as well as in Russia. To make a firmware update, they need to order the code through their program to Germany. How long to wait for an answer, as I understand it, about a week! If there is an opportunity to wait, they will do it. It was recommended to go to the city of Edirne, near the border with Bulgaria, where an update is already working through its own GSM system in the car. Well, something like that. Any service center that repairs Mercedes Benz can sell oil, it's not a problem at all. I was sold the original 850TL for 1 liter.