E 320 Coupe (124.052) L6-3.2L (104.992) (1994)
side of the assembly is fitted with a damping weight (7) and spring washer (8) secured by a nut (9).
OPERATION
The two knock sensors (A16) which are mounted on the engine block are subjected to vibrations generated by knock. The vibrations cause a small
distortion on the surface of the piezoelectric crystals, which consequently generates a small voltage. This voltage is read by the HFM-SFI control
module. The control module retards the ignition point for an individual cylinder by 3° crankshaft angle per ignition cycle (Max. of 12°). The knock
control system develops its maximum ignition retard of 12° crankshaft angle at a coolant temperature of 91° C (194° F).