Takes a special tool, although I've heard of it being done with a 17mm crowsfoot (but have heard that more offten than not the crowsfoot breaks). You need the Hazet # 2770-4, 17mm valve adjustment tool - about $68-$70 or so. Might try Phil at PartsShop/FastLane and see if he can obtain one, if not try Baum Tools at Baum Tools
'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.