300e Sunroof making noise but not opening

[importautolova]

I know this topic has probably been posted numerous times, but i can't find one specifically for the 1987 300 e. Basically, I am 99% sure i have a busted cable. The motor makes all the noises when the button is pushed, but nothing happens. Can someone provide me some information as to how to change the cable? The sunroof is in the closed position and I don't know where to begin. Thanks for your help!