85 300SD throttle cable/ pedal No power

[Beastie]

Okay, Yesterday as I drove home the car felt sluggish. Got home did my to do list and forgot about it. This a.m. leaving for work it was very noticeable and worse than before. I could not stop and the wife had the only other car I could use so I drove to work.
The pedal appears to only have 1/2 -1 inch of travel inside. The car shifts between downshift and upshifting if you give it too much throttle.
I do not believe it is a tranny problem rather throttle cable and or throttle cable adjustment. I looked at the linkage closest to the firewall and it looks like the bolt may have slipped. Does anyone have a good pic of the engine top ( showing throttle linkage) and linkage at firewall. It was a pain to drive it this way and I have a 1 hour drive home when I get out of work at 6:00 tonight
( east coast )
Thanks
Alan