I have a new (to me) 1973 450SL. I doubt the hardtop has been off in the last 20 years, but given that I live in Southern California (and the AC isn't working) top down driving is the only way to go. Anyway, when I went to take the hardtop off it stuck for a while in the center rear but with a bunch of jiggling of the controls and the help of a friend eventually came free. All was fine until I put the softtop up and then wanted to take it back down. I can't for the life of me get it free in the back. I have tried to follow the instructions: control lever in position B (about 10 oclock on my car
), and safety latch in position E (about 6 o'clock), but it doesn't even pop out of the first latch until I push the lever as far as it will got o position C. Then it pops up about 3/4 of an inch but is firmlly locked at that point...I played with jiggling the levers (broke the control handle knob off!) to know avail...the safety catch spins freely, never feels any different but I must be up against the secondary latch...Any advice? I'm frustrated.