OE for plugs and most probably for air filter too... The thing to remember here is that most plugs have built in resistance and our MBZs do not require that type since the wire jacket/sleeve provides 1kohm...

cheers,

__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen