6 piece set of Spark Plugs:

DENSO 5031 T20EP-U NON-RESISTOR (Copper)

Pre-Set Gap at 0.032" (.8mm)

190E 2.6

260E

300E 2.6, Base 3.0

300TE, 4-Matic

300CE

300SE 300SEL

W201 W124 W126

Most online retailers will sell you the incorrect Bosch plugs which come with a resistor built into the plug.  The OEM Factory plugs were Copper NON-RESISTOR.  Using the wrong plugs can damage the EZL Ignition system on KE-Jetronic Bosch Engine Management Systems on Mercedes-Benz classics.  This is a pricey module you want to keep safe!

Switch to these plugs today and your M103 engine will run and idle much smoother.

DENSO spark plugs are high quality and OEM Fitment.