No slack in 190e instrument cluster cable

[190eHI]

Hello: I am trying to remove the instrument cluster in my 1989 190e, and I cannot seem to get enough slack to get my hand behind it to remove the speedo cable. I haven't been able to find any place that I can get my hand on the cable to push it, and I can only get the cluster out enough so it just barely clears the surround, and it's just enough to make me think "I only need about one and a half more inches and I'll get it". Can anyone give me any guidance on where I can get some slack in this cable? Thanks.