luoskywalker

Hi, my 1999 E430 has this readout on the cluster Hydraulic oil level. It has a small picture of what it looks to be a steering wheel.
I checked the power steering fluid but it is where it needs to be. Can someone elavorate for me on this issue. I read the owners manual however it does not explain anything about this.

I will appreciate any input.... Please

E-Klasse

Is it harder to steer or make noise when you turn the wheel all the way to each side. The fluid level should be above the filter. If you don't see any leaks then the sensor might have gone bad.

luoskywalker

The steering is fine and there are no visible leaks. And the fluid level is ok. Where is the sensor located? How can I test this sensor.
So is this readout related to the power steering......

protonspring

Any resolution here? I have a 1999 E320 4MATIC sedan with the same error message.

I can't tell if the car has a rear-leveling system or not. There is NO separate hydraulic
fluid reservoir other than the power steering reservoir. However, there is NOT a fluid
level sensor for the power steering reservoir that I can see.

So, where in the world does this error message come from? What hydraulic fluid is it talking about? Where is this sensor supposed to be? Local MB dealers here seem a bit confused.

protonspring

Turns out that the cluster is from a different vehicle (that likely DID have hydraulic leveling shock system or similar).

After some circuit analysis, I discovered that the hydraulic level sensor is a simple switch, which, when closed, connects to ground. This means that I can short the hydraulic oil level sensor line to ground, the cluster will believe that the hydraulic fluid is fine and it should remove the error.

I discovered that the hydraulic oil level is a single pin at the back of the instrument cluster: Left connector, pin 2I. I modified the instrument cluster connector to connect the 2I pin to ground and the message is now gone.