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GLC Class (X254) Produced 2023+

Oil Change

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Old Jun 10, 2026 | 06:02 PM
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Steve Lyons
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Oil Change
Has anyone performed an oil change on their 2026 GLC 300? It looks pretty straightforward, but I do not see a dipstick, so I assume it is electronic and you have to use a scan tool to check levels?
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Old Jun 10, 2026 | 06:08 PM
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Originally Posted by Steve Lyons
Has anyone performed an oil change on their 2026 GLC 300? It looks pretty straightforward, but I do not see a dipstick, so I assume it is electronic and you have to use a scan tool to check levels?
Check the level in the ASSYST PLUS screen after pressing the home button and scrolling to service.
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Old Jun 10, 2026 | 06:09 PM
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Alternatively go to this menu: https://mbworld.org/forums/glc-class...dden-menu.html

Since you want to reset the service interval anyways, plus it has a more precise amount displayed instead of the vague one in the regular ASSYST PLUS.
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Old Jun 10, 2026 | 06:10 PM
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By the way, you might find this document shared by another forum member useful for the services required for this vehicle: https://mbworld.org/forums/attachmen...700d1773789696
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Old Jun 10, 2026 | 07:00 PM
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Perfect! Thank you. I will check out the menu and post a few pictures of the results.
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Old Jun 10, 2026 | 08:26 PM
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Originally Posted by Steve Lyons
Perfect! Thank you. I will check out the menu and post a few pictures of the results.
You're welcome, happy to help.
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Old Jun 11, 2026 | 05:51 AM
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From: SFV
2025 C300
Originally Posted by Steve Lyons
Perfect! Thank you. I will check out the menu and post a few pictures of the results.
You need the menu to measure the oil. After you change the filter and oil, it will ask if the oil has been filled. Leave it running for at least 10 minutes it will measure the oil and tell you how many liters to top off or drain.
You also need to use the menu to reset the service reminder. After confirming it will say full service carried out. Do not press the confirm service over and over again. The service message will disappear at the next start.
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Old Jun 11, 2026 | 06:02 AM
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Originally Posted by 818benz
You need the menu to measure the oil. After you change the filter and oil, it will ask if the oil has been filled. Leave it running for at least 10 minutes it will measure the oil and tell you how many liters to top off or drain.
You also need to use the menu to reset the service reminder. After confirming it will say full service carried out. Do not press the confirm service over and over again. The service message will disappear at the next start.
This
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Old Jun 11, 2026 | 08:29 AM
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From: Barrington IL
2015 E 250, 1999 BMW M Roadster, 1939 International Harvester, 2023 GLC
I have done several on our GLC 300. Oil plug is plastic and it is recommended to replace with new each oil change, filter is easy. Removing the protective cover to get to the oil plug is not too bad. Reset is easy and you can find the procedure on line.
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Old Jun 11, 2026 | 02:20 PM
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Yes, I agree with the plug but find it crazy price - I believe it is 26.00...about twice as much as the filter
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Old Jun 11, 2026 | 04:27 PM
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Originally Posted by slk3202001
Yes, I agree with the plug but find it crazy price - I believe it is 26.00...about twice as much as the filter
It might be because it is "superplastic" Just kidding : ) but not really kidding in a sense.

Edit: link https://www.mercedes-benz.com/en/art...-superplastic/
Last edited by W205C43PFL; Jun 11, 2026 at 04:27 PM.
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Old Yesterday | 12:39 AM
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From: SFV
2025 C300
Originally Posted by slk3202001
Yes, I agree with the plug but find it crazy price - I believe it is 26.00...about twice as much as the filter
If you have an MB dealer, they should have a parts department. I think I picked mine up for $10.

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Old Yesterday | 06:03 AM
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Originally Posted by 818benz
If you have an MB dealer, they should have a parts department. I think I picked mine up for $10.
Is it this part number? Buying it online does seem to be expensive, save the trip to the dealership though (assuming shipping isn't too expensive):
https://mbparts.mbusa.com/oem-parts/...-plug-29902017
https://classicparts.mbusa.com/oem-p...-plug-29902017
https://www.mbpartscenter.com/oem-pa...-plug-29902017
https://www.mercedesbenz.parts/oem-p...-plug-29902017
https://parts.mercedesbenzofmiami.co...-plug-29902017
https://www.mbpartsource.com/oem-par...-plug-29902017
https://www.mboemparts.com/oem-parts...-plug-29902017
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Old Yesterday | 08:17 AM
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SEC1939
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From: Barrington IL
2015 E 250, 1999 BMW M Roadster, 1939 International Harvester, 2023 GLC
I got mine from Rock Auto, Looks legit
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Old Today | 07:45 AM
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From: SFV
2025 C300
I had a hard time finding the part number for the filter, screw, and ring so I asked the man at the parts counter. He was able to get me everything for like 35ish I believe. It was all OEM parts and way cheaper than listed anywhere online. I also used the Kirkland 0-20 full synthetic oil (may be controversial as it doesn't fit MB's own standard and other reasons) but am supper happy with it!

I'm due for another oil change in August so I'll report back!
Last edited by 818benz; Today at 07:48 AM.
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Old Today | 08:19 AM
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From: New Jersey
2023 GLC300 4Matic
I bought my CPO car with 10K miles on it. Dealer changed oil then. I'm doing the next oil change at 15,000 miles, so I won't be changing/updating the Assyst Plus menu. I'll just keep my own service log and parts receipt from FCP. They charged about $10.00 for the drain plug (total kit came to $99.00)
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Old Today | 08:54 AM
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Originally Posted by 818benz
I had a hard time finding the part number for the filter, screw, and ring so I asked the man at the parts counter. He was able to get me everything for like 35ish I believe. It was all OEM parts and way cheaper than listed anywhere online. I also used the Kirkland 0-20 full synthetic oil (may be controversial as it doesn't fit MB's own standard and other reasons) but am supper happy with it!

I'm due for another oil change in August so I'll report back!
Sounds good, that's a happy ending right there!
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Old Today | 08:56 AM
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I recommend motul xcess gen 2 if 229.5 is the certification required though but pennzoil also make good engine oil.
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