I have Nology wires on my 16V Scirocco...they are nicer than stock and with the Beru Silverstone plugs the car runs like a champ....but they are alot thicker than OEM so they may pose a problem when routing them in the tight E500.
Hendy has the Magnacore wires and I believe he likes them very much....in either case though...on the M119 motor don't expect to see much of a difference if any at all.