Dear All, I bought a BMW 540i Touring recently, this car came with a hydraulic trunk (hydraulic open and closed via the key) Now the problem is that the hydraulic system was empty for a long time. When I opened the trunk i heared the hydro pump buzzing. Now I've filled up the system with...

I researched the forum and can't find the name of the hydraulic fluid to use for the trunk closer.. Some say just use ATF.. Can I use the hydraulic fluid that is used in the front hydraulics on my 750?