Keep an eye on engine oil pressure with the Standard Ignition Engine Oil Pressure Switch PS-329. This threaded switch senses the pressure of the oil circulating through your engine and drives the dashboard oil-pressure warning light or gauge circuit, giving you an early heads-up when pressure falls outside the normal range. It drops in as a direct-fit replacement across a broad list of Mercedes-Benz models, including the 1984-1993 190E, the 1986-1993 300E, the 1986-1991 420SEL and 560SEL, and the 1994-1999 S320, S420, S500 and S600 — see the Buyer's Guide tab for the complete 44-application list.
Interchange: Manufacturer part number PS-329 (also PS329).
What does the PS-329 oil pressure switch do?
It senses your engine's oil pressure and opens or closes the circuit to the dashboard oil-pressure warning light or gauge, alerting you when pressure moves outside the normal range.
How do I know if my oil pressure switch is failing?
Common signs are a warning light that stays on or flickers with a good oil level, an erratic gauge, or oil weeping at the switch. Diagnose the cause first, as these can have other sources.
Does this fit my vehicle?
It's a direct-fit replacement for a wide range of Mercedes-Benz models from 1981 through 1999. Check the Buyer's Guide tab against your exact year, model and engine to confirm.
Will replacing this switch fix a low oil pressure reading?
If a faulty switch is causing an inaccurate reading, this replaces it. A genuine low-pressure condition, however, needs mechanical diagnosis before assuming the switch is at fault.
What is the manufacturer part number?
This is Standard Ignition Engine Oil Pressure Switch, manufacturer part number PS-329.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
