Brothers of the Benz, hill
It's apparent that 8.5mm ignition wires fit the cap of my 103983 engine or I wouldn't be commenting about them.
The larger diameter wires will not fit in the wire channel on the cam cover and must be routed outside as other non-Benz autos do.
My wires are solid core non-suppresive or resisted, and I use copper cored spark plugs.
The metal covers that come OE, to my understanding from other German machines, are not heat shields but are RF shields grounding a shieth in the spark plug wire to ground at the plug.
This eliminates the static from the ignition you would normally hear on AM radio.
Budget Plug wire sets don't have this shielding.
Good luck and choose wisely.
Happy Trails Beep Beep from The Spiderman in Houston!!!