Hello everyone. My 508 1.6 ehdi 2012 car. First, I was hit with a "Have the transmission checked" warning. Later, even though the car was in forward (A) at a red light, when the green light turned on, the car started to reverse as if it were in R. I could barely move forward after several stop-start attempts. When I went to the service center, I noticed a pressure drop, and even though the oil level in the engine oil tank was above the minimum, they added it. I continued using it, but after each oil change, the engine oil tank leaks more oil from the reservoir cap when the vehicle is parked. I'd like to ask for your help on why the engine oil tank leaks from the reservoir cap.