Someone expert on 9g gear box?
It all started on August 5, I took my Cls350d 9g auto to mercedes workshop for gearbox maintenance. I didn't see anything at the time because the next day I went on vacation. This Monday I saw a stain of oil coming from the gearbox. I contacted the garage and they made the diagnosis. They told that I have broken the carter in this and I have to pay to change. But something doesn't seem right... I was told they cleaned the box and left the car running 45 mins without oil appearing. He only appeared after the car went on the road to test.
Wouldn't it be normal for the carter to constantly leak oil? Why doesn't it stop even if it warms up?