300E 4MATIC (124.230) L6-3.0L (103.985) (1990)
Spark Plug: Specifications
Spark Plug Torque
TIGHTENING TORQUE
With flat seat & gasket ........................................................................................................................................................ 20-30 Nm (14.7-22 ft lb)
With tapered seat ................................................................................................................................................................ 10-20 Nm (7.4-14.8 ft lb)