He is suggesting that you change NOW at 120K, since it is reccommended that the V-8's have a timing chain replacement at 100K. Remember, this chain is long, very long at 198 links. Good time to check out the upper chain rails too.
Now a question for future reference: Is it possible to replace the upper chain rails without having to pull the front cover?
'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.