Mercedes vehicles are equipped with an oil pressure switch that is designed to monitor the oil pressure in the engine. If the oil pressure falls below a certain level, the switch will activate and send a signal to the engine control unit. This will cause the engine to enter into a “limp home” mode, which will reduce power and speed in order to protect the engine from damage.
The Mercedes oil pressure switch is a crucial component of the vehicle’s safety system, and it is important to ensure that it is in good working condition. Regular maintenance and replacement of the oil pressure switch can help to avoid potential engine damage and ensure that your Mercedes operates at its best, but when it has a problem, it’s good to be able to identify it and know when it’s time to bring it to our specialists.
There are a few signs that owners can watch out for to know if their oil pressure switch is failing.
Unusual Engine Noise
One sign is an increase in engine noise. If the oil pressure switch is not working properly, it can cause the engine to make more noise than usual. If the oil pressure falls below a certain level, the oil pressure switch will activate and send a signal to the engine control unit, causing the engine to produce odd noises. Our mechanics have reported that a failing oil pressure switch can cause a knocking or ticking noise from the engine.
The oil pressure switch is designed to protect the engine from damage by preventing oil starvation, so Mercedes recommends replacing the oil pressure switch if it is malfunctioning. Mercedes also recommends replacing the oil filter at each oil change to help prevent damage to the engine.
High Engine Temperature
Another sign is an increase in engine temperature. The oil pressure switch helps to regulate the flow of oil to the engine, and if it is not working properly, the engine may overheat. This is because the oil pressure switch controls a valve that regulates the flow of oil to the engine. When the switch fails, the valve remain open, allowing too much oil to flow into the engine. As a result, the engine becomes overloaded and overheats. In some cases, a failing oil pressure switch can also cause oil to leak into the engine, which can also lead to overheating.
Decreased Fuel Economy
A third sign is a decrease in fuel economy. If the oil pressure switch is not working properly, it can cause the engine to use more fuel than usual. When the switch is not working properly, the engine may receive too little fuel, resulting in decreased fuel efficiency. In some cases, the oil pressure switch may also cause the engine to run rough or stall.
Engine Warning Light
Finally, a fourth sign is an illuminated check engine light. If the oil pressure switch is not working properly, it can trigger the check engine light to come on. If any of these signs are noticed, it is important to take the Mercedes to a qualified mechanic so they can diagnose and fix the problem. By doing so, owners can help prevent further damage to their vehicle and keep it running smoothly for years to come.
The Experts at Vaughan Automotive Will Repair Your Oil Pressure Switch
Mercedes-Benz oil pressure switches are designed to last the lifetime of the vehicle. However, if your switch does need to be replaced, our mechanics 
are highly trained and experienced in performing this repair. First, they will disconnect the battery and relieve the pressure from the oil system. Next, they will remove the old switch and install the new one, making sure that it is correctly positioned. Finally, they will test the new switch to ensure that it is working properly. With our Mercedes-Benz oil pressure switch repair service, you can rest assured that your vehicle will be back on the road in no time.
Mercedes has a strict maintenance plan in their owner’s manual. It is important to follow this schedule in order to maintain your Mercedes model in its pristine condition. Vaughan Automotive has the certifications, experience, and state-of-the-art tools and equipment to provide all the services your Mercedes needs, so if you live in or near Buckhead, Mableton, Marietta, Sandy Springs, Smyrna, Vikings, or Atlanta, GA, give us a call today!