ML 63 AMG (164.177) V8-6.3L (156.980) (2007)
Function
The engine oil from the engine oil pan reaches the oil level switch via 2 bore holes in the switch housing. The float is moved according to the oil level.
The dry-reed contact is closed for an adequate engine oil level by the magnetic field from ring magnets. If the engine oil level becomes too low the
dry-reed contact opens and the connection to the ground contact is interrupted. This recognized by the ME-SFI [ME] control unit and a suitable warning
signal is sent via the CAN data bus to the instrument cluster (A1).
Short-term fluctuations in level are compensated for by to the size of the oil volume and the 2 bores in the switch housing
(e.g. during braking or for cornering) which avoids unnecessary warning signals.