I have a 1990 and a 1991 both Mercedes 300sl's. The hydrolic cylinders for raising the convertible tops are leaking. Can anyone tell me how to access these hydrolic cylinders so I can remove them. Does anyone maybe have a diagram on removing same. Any help would be greatly appreciated. If I get successful, I also need to know if these cylinders can be repaired i.e. new gaskets or need I buy new ones?