Valve covers are a snap
First remove the air cleaner assembly( both intake tubes plus the tube from the air pump, plus the single 10mm nut, lift assembly off).
The starboard (passenger) side cover is easiest. Remove all four plug wires and the four 10mm bolts (do not loose the tiny copper washers). Pop valve cover off.
For the port side (driver's). Remove the four plug wires, then loosen the fitting for the fuel cooler lines at the fuel distrubutor (17mm nuts I believe). Lift the lines away from the distributor and wire them in an up position (so they don't continue to leak fuel). Might also need to disconnect the vacuum line to the EGR valve at the left exhaust manifold. Next remove the four 10mm bolts and pop off the valve cover.
Assembly is the reverse. Do not over tighten the valve cover bolts or the new seals will leak like a sieve.
'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.