I kept the tensioner in, but loosened the mounting bolts a little more than halfway. I figured having the tensioner providing a little tension would keep everything in perspective. My replacement chain came with two small clips rather than the single large one. Have gone about 13K miles with no problems. Be sure to mount the c-clips with the open end trailing, that way if the clip should contact anything it will be pushed on rather than knocked off.
You will also find that getting the new tensioner in is a real be-itch. Took everything I could muster to push it in and hold it while trying to the the bolts started - you'll see.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.