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I just had the oil and oil filter changed yesterday. I'm getting "check eng. oil lev. when refuelling" on the dash when the engine oil gets up to around 80 Celsius.
Drove to work carefully. Checked oil 5 minutes after shut off and its slightly below the max mark on the dipstick so OK. Checked 10 minutes later and it's showing oil is at the max mark. I don't think any more oil needs to be added.
I've never had this error pop up before, and this is the third time oil has been changed since I took ownership.
Possibly the sensor happened to become faulty during the service and its bad luck or could there be another problem? 🤔
The oil was overfilled. This happened on my brand new GLA45 AMG and I got the same warning when the oil got hot, which means it expanded. The good news is that these engines have fail safes and go into limp mode is filled too low or too high.
Drain some oil out until the oil level is a bit BELOW the maximum level and you should be fine.
The oil was overfilled. This happened on my brand new GLA45 AMG and I got the same warning when the oil got hot, which means it expanded. The good news is that these engines have fail safes and go into limp mode is filled too low or too high.
Drain some oil out until the oil level is a bit BELOW the maximum level and you should be fine.
Thanks for your reply I'm not sure mine is overfilled? ..
5 minutes after engine was turned off (oil was at operating temp and got to 103 degrees celcius). Oil level is about 80-85% toward full line (second tab), I.e oil is bit below max level 3 hours after car was turned off. Oil is on second tab but not above
I am so sorry but it is hard to tell with the lighting what the reading is. But now I see why Mercedes went to digital gauges, which can be a pain, but look at the clarity:
Maybe get a different angle? However, if I was to guess, the oil being all the way to the top, if that is what I am seeing, means that indeed there is too much oil. You don't want the oil to be at maximum, but just below.
Did the Dealer do the oil change? What viscosity oil?
Go to whoever did the work and explain this has never before occurred.
Unless you have the ability to suck the oil from the dip stick, I'd have the Company that did the job sort it out.
Did the Dealer do the oil change? What viscosity oil?
Go to whoever did the work and explain this has never before occurred.
Unless you have the ability to suck the oil from the dip stick, I'd have the Company that did the job sort it out.
Molygen 5w40 was used. Independent did the change, not the dealer. Will get them to check and see what they say. I have not noticed any rough idling or smoke coming from the engine or exhaust
Update: Had 0.4L pumped out. With car sat overnight, engine off, oil is at max mark on dipstick (no oil showing on the max notch itself anymore). After reaching operating temp, 5 mins after engine shut-down oil is half way between min and max. A couple more minutes later oil is a little above half way (I.e more towards the max mark than min mark)
This morning got the check oil level msg when oil reached operating temp. Restarted the car. Msg came back on dash after 10 minutes driving. Restarted the car. Same thing.
The Molygen is NOT an approved MB 229.5 oil. LiquiMoly RECOMMENDS it for cars that require MB 229.5 oils, but it is not on the Bevo list nor does it say that it has MB 229.5 APPROVAL. I would not run that... for all we know, it may have solid Moly particles in it that just clogged up your oil level sensor. If you're going to run an unapproved oil, you might as well get something that has been thoroughly tested and has been proven to work well. Was that particular oil your choice or did the shop put it in without consulting you first?
A faulty sensor is a definite possibility, but the fact that it started right after the last oil change is a bit... well, too coincidental. Oil level sensors on the M156 are not exactly known to fail.
The Molygen is NOT an approved MB 229.5 oil. LiquiMoly RECOMMENDS it for cars that require MB 229.5 oils, but it is not on the Bevo list nor does it say that it has MB 229.5 APPROVAL. I would not run that... for all we know, it may have solid Moly particles in it that just clogged up your oil level sensor. If you're going to run an unapproved oil, you might as well get something that has been thoroughly tested and has been proven to work well. Was that particular oil your choice or did the shop put it in without consulting you first?
A faulty sensor is a definite possibility, but the fact that it started right after the last oil change is a bit... well, too coincidental. Oil level sensors on the M156 are not exactly known to fail.
Thanks for your reply Diabolis. A few people are running Molygen here without issue, I'm not sure it has any particles in it. Maybe someone here that knows more about the oil can chime in.
Agree that it's too coincidental for this to happen right after the last oil change . Previously I was using Castrol Edge 5w40.
Something very strange is going on, today when I checked the oil after a drive, it's showing slightly above the max mark. I'm fairly sure I was on level ground , and I checked 6 or 7 times and got the same result. Will take the car back to mechanic on Monday...
wonder if anyone here knows when the oil sensor is supposed to trigger the msg (I.e at what point over max and at what point does the system consider the oil too low...)
Update: Oil changed and oil level sensor in upper pan replaced. Oil is slightly below max mark on the dipstick. I'm still getting the "check oil at next refuelling" message, but it seems to be only the first drive after the engine has sat overnight or for a few hours and the engine oil is cold.
Really strange... I've used that oil several times with no issues. Sounds like you've done most of the common things we could think of. An easy thing to try... disconnect the battery for a while and see if that helps. Electronics do strange things...
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