HELP! I found an extra spring and dont know where it goes!

[crhenkel]

THis is ridiculous! I have had my 1990 190E 2.6 for sale and the most bizarre things have gone wrong with the car. First a claiper locked up on a test drive and then the fan or one of the items that runs off the accessory belt is making a undiesirable grinding noise. I fixed the brake caliper and cant seem to determine which item is making the new "bad bearing" grind up at the front engine cooling fan. BUT NOW! I let a guy test drive it and he came back to tell me it tried to die everytime he gave it gas. He left and I opened her up only to find that indeed it is backfiring and the rpms drop to almost nothing on acceleration. I removed the air cleaner to find a "throttle return spring" unconnected and just laying on top of the throttle linkage. I can not see where it goes either.
Can anyone get me directed to the correct location to connect this dumb spring. I dont remember what it goes to and it is not the same as my 16v so I have nothing to look at for reference.
I have attached a photo of the spring and If anyone can get me a picture of a 88-91 2.6 throttle linkage with the cables and springs I can reconnect this spring to see if it fixes the bad stall. Prior to this there was no hesitation in the car.