What causes low oil pressure on start up?
Low oil pressure (or none on start up like me), evidenced by the aforementioned noises, or nil oil flow to the engine on visual inspection, may be caused by the failure of the non return valve that fits between the oil pump and the engine.
What to do if your oil pump is not working?
Drop the engine oil. As you know, these things have a LOT of oil in them so use a large container. Undo the two engine mount bolts on the RHS of the car.
Why does my oil pressure valve not open?
In my case, the valve housing has worn so much it has permitted the shaft of the valve to cock slightly sideways, preventing the valve from opening, restricting oil flow to the engine. This particular part is in ready supply at my friendly dealer, suggesting this may be a commonly replaced part.
Why is my oil pressure not working on my Mercedes?
As you can imagine, if this switch or sensor isn’t working well, then you could be driving your Mercedes with inadequate levels of oil or oil pressure—which is a big problem. Mercedes cars are generally sophisticated in that they adequately communicate to the driver when there is a performance issue to address.
How can I tell how much oil is in my Mercedes?
Your dashboard should vaguely let you know how much oil pressure the system contains. In older Mercedes models this gauge is less technologically-based, but still easy to read in the dashboard. If the oil pressure gauge looks low or doesn’t move, then the oil pressure sensor might need to be replaced.
Why is engine oil important in a Mercedes Benz?
Engine oil is one of the most critical components in any car, let alone performance vehicles like Mercedes-Benz cars. Having the right amount of oil is essential, and the quality of oil must also be kept clean. Another important component of engine oil functioning is oil pressure.
What is the oil level sensor on a Mercedes Benz?
Below you will find step by step instructions with pictures on how to remove and install a new engine oil sensor on a Mercedes Benz engine. Part numbers related to the oil level sensor are shown below and there could be more. The purpose of the the oil level sensor (B40) is to measure the oil level but also oil temperature and the oil quality.