Oil level warning
Thread Starter
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Joined: Oct 2007
Posts: 164
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From: Surrey B.C.
2013 GLK 350 4 matic
Oil level warning
Looked everywhere but can't find an answer.
Hasn't happened to me but if low oil message comes on is it because of oil pressure or level.
If it is the oil level, how liters to bring up to full?
I do check my oil on a semi regular basis but it never goes down.
Hasn't happened to me but if low oil message comes on is it because of oil pressure or level.
If it is the oil level, how liters to bring up to full?
I do check my oil on a semi regular basis but it never goes down.
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Joined: Feb 2025
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If it’s the oil level warning, you will need to add about 1/2 qt of oil and see if the warning goes away. If not, add another 1/2 qt. Your cars oil level should never drop unless it has a big leak or burns a lot of oil.
If it’s an oil pressure warning, I’m sure it’s a different warning, because low oil pressure is a very bad thing. You will want to shut off the engine immediately until you can figure out why it’s happening.
A low oil pressure warning because of a low oil level probably will never happen.
If it’s an oil pressure warning, I’m sure it’s a different warning, because low oil pressure is a very bad thing. You will want to shut off the engine immediately until you can figure out why it’s happening.
A low oil pressure warning because of a low oil level probably will never happen.
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From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Believe it or not, there is no oil pressure sensor...
It's a level sensor. Use the dipstick to figure out how much to add. It's 1 liter (about 1 quart) between "full" and "add" on the dipstick. I'll bet the warning doesn't come on until at least another quart low beyond "add".
It's a level sensor. Use the dipstick to figure out how much to add. It's 1 liter (about 1 quart) between "full" and "add" on the dipstick. I'll bet the warning doesn't come on until at least another quart low beyond "add".
Thread Starter
Member
Joined: Oct 2007
Posts: 164
Likes: 55
From: Surrey B.C.
2013 GLK 350 4 matic
Hard to believe there is no pressure sensor, but in 50 years of driving I never had a pressure warning. I have always kept a liter of oil in my cars,, just in case but never needed it.
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From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
I have. Twice. Once it was low oil level. The other time it was a faulty sensor. I was a young kid. Pulled into a service station (remember them?) and the guy checked the oil level (it was good). Bad sensor, he said. Then, he pointed to the sensor and there was a drop of oil on the end of it.
Last edited by John CC; Feb 13, 2026 at 05:13 PM.
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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
Believe it or not, there is no oil pressure sensor...
It's a level sensor. Use the dipstick to figure out how much to add. It's 1 liter (about 1 quart) between "full" and "add" on the dipstick. I'll bet the warning doesn't come on until at least another quart low beyond "add".
It's a level sensor. Use the dipstick to figure out how much to add. It's 1 liter (about 1 quart) between "full" and "add" on the dipstick. I'll bet the warning doesn't come on until at least another quart low beyond "add".
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MBWorld Fanatic!
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From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
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From: Lac Ste. Marie, Quebec
2006 Alfa Romeo Brera, 2010 GLK350, 2018 BMW 640i GT, 1997 Subaru SVX, 2012 Moto Guzzi Norge GT8V
If y'all read the original post, it has not even happened. It's a hypothetical question.
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From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Well, consider the answers hypothetical, too!
My GLS has three warnings: Check at next fuel stop, Add one quart, and stop the engine right now. I assume you have to ignore the first two to get to the third. The GLK has only the first one. The manual says "The engine oil level has dropped to the minimum level."
I used to get a warning light on my 350SDL once in a while. It was usually down a little more than a quart.
My GLS has three warnings: Check at next fuel stop, Add one quart, and stop the engine right now. I assume you have to ignore the first two to get to the third. The GLK has only the first one. The manual says "The engine oil level has dropped to the minimum level."
I used to get a warning light on my 350SDL once in a while. It was usually down a little more than a quart.
