Have him check the upper rails, the tensioner rail and definitely change the tensioner while doing the chain. Might also ask to have the cam sprockets checked for wear and perhaps even have the oiler tube kits put in for good measure. The oiler tubes are held in by little plastic fittings that get brittle with age. Chances are they are fine, but the parts are very short $$$ and should only take a couple minutes, great for extra peace of mind.
'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.