S 420 (140.043) V8-4.2L (119.981) (1996)
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Sight Glass: Description and Operation
The refrigerant pressure sensor (B12) familiar from model series 210 and the refrigerant temperature sensor (B12/1) are installed on the fluid reservoir.
An observation glass for the refrigerant level check is no longer present. The refrigerant level is checked by the refrigerant pressure sensor (B12)
and the refrigerant temperature sensor (B12/1) via the AAC pushbutton control module.
