500SEL (126.037) V8-5.0L (117.963) (1984)
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)