Any suggestion??

I suggest you reduce oil level!!!

If you just bought the car, change the oil + filter and refill with correct amount. Consult your owners manual what that is but I'm pretty sure it's Not 9.4 L for 320 CDI. BTW: that instrument cluster reading should be ~ 0.3 L less than specified oil capacity, when oil is hot and car on level ground.

 

Hi Photodude,

Yes, I have measured on level ground and hot/cold oil. I don`t have any owner manual. Can you send me a link for that? My model is E320CDI 2005 line-6.

Thank You

 

Google

2005 mercedes e320 cdi owners manual - Google Search

 

You need to avoid driving the car and change the oil asap , as per photodude refill with the correct amount which is 7.5l.. too much oil can cause damage.
Measure it out carefully to get the right amount..
Do not use the dash display to set the level...it tells you the amount in the sump ,,which is less than the amount required to correctly fill after an oil drain and filter change.

 

The same thing happened to me on my 2005 E320 CDI. I bought it out of state from an independent dealer and started driving it home on the interstate. I got the red overfill warning and had to find the nearest MB dealer. Many non-MB mechanics have no idea how to correctly measure the oil level in these engines since there is not a dipstick. (I have even had MB mechanics overfill it.) To make sure, I bought a dipstick to measure it myself. As Photodude says, you can Google for the manual as well as for a dipstick. Since the dipsticks out there measure in mm, I use the attached oil level chart to see what the measurement should be. It shows how many liters it is over- or under-filled depending upon the measurement. If you are in the US, the commas are periods for us. Hope this helps.

 

By the way, the motor in the 2005 E320 CDI inline 6 is known as an OM648. This will help you with your Google searches on dipsticks, etc.

 

engine oil level reduce oil level

 

So was your car reporting that you have 9.4 liters of oil in the crankcase? That what it looks like cluster is saying.

That's odd, because mine (in US) is reporting that I have 9.4 quarts in the crankcase and I've been getting the same 'reduce oil level' message.

Starting to wonder if the 9.4 is some sort of default figure for failed level sender.

What was the resolution to your problem? Were you actually over full on oil?

Steve

 

Yes, starting to sound like 9.4 means the float is stuck at the highest position or the level circuit is fried.

Sixto
05 E320 wagon 181K miles

 

Easiest way to check if oil level sensor is “stuck” would be to start the engine, there should be an instant reaction (drop) on the liter/quart reading.

 

I just checked cold start on ‘05 M112. It took 10sec to drop 0.1qt then less time to drop another 0.1qt, yadda yadda. It took about 60sec overall to drop a full quart. I didn’t wait for steady state. 1500 miles on Mobil1 0W-40, Mann fleece filter, 54F ambient…

Sixto
05 E320 wagon 181K miles

 

Oil temperature is a factor here, how quickly sensor responds, but both instrument cluster and SDS display real time data from the same oil sensor.