Holder Cup

How I can fix my cupholder in my Mercedes ML430?
From start to finish: The cup holder in my car was open when my friend hit him in with the knee and came out of its socket. A spring also fell down and I can not put in place. I tried to put it back and kind of works, but requires much more work to open it. What are some step by step instructions on how I can fix it to work. No broken parts, just misplaced.
Normally, the cupholder is not subject to further disassembly within factory specifications comes preassembled so no detailed assembly / instructions removal are available from the manufacturer. From what source is saying that the preload mechanism does not provide enough tension – maybe check leaned in the process?
Saab Cup Holder