Hello Saabfreunde, my cover can only be opened at temperatures above 25°C. I searched in vain for the control of the oil level and the oil type used for the hydraulics. Who can give me a tip? I have inspected the pump and the oil container behind the backrest before. Since the problem only occurs with prolonged non-activation of the cover and I could not detect any oil loss on the known cylinders, I go one way. I assume that after 12 years some oil has been lost. Thank you for an answer!