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Today used a new independant shop to perform the "B" service on my 2020 GTc. Immediately after driving it got this message. Tech at shop hadn't seen this before and neither have I. Figuring, or hoping, it's just a sensor that fired off after changing the oil. Anyone??
2025 Lucid Air Grand Touring, 2022 F-150, 1926 Rolls-Royce SSG roadster
It happens whenever the mechanic changing the oil fails to follow directions. The oil must be heated with the engine on to running temperature. The oil filter must be changed. There is a whole procedure. We've discussed here in many threads. In fact, I thought at first this was one of my prior threads.
Bottom line is that you have too much oil and need to have some removed. Next time, find a mechanic who works on AMG engines. Most (but not all) dealers now know what to do. Independent shops? Who knows.
Today used a new independant shop to perform the "B" service on my 2020 GTc. Immediately after driving it got this message. Tech at shop hadn't seen this before and neither have I. Figuring, or hoping, it's just a sensor that fired off after changing the oil. Anyone?? https://cimg2.ibsrv.net/gimg/www.mbw...ff5bda8f0b.jpg
As mentioned by others, dealership's responsibility, take it back and try not to drive it, we don't know how much it is overfilled, and overfilling engine oil by too much damages the engine.
It happens whenever the mechanic changing the oil fails to follow directions. The oil must be heated with the engine on to running temperature. The oil filter must be changed. There is a whole procedure. We've discussed here in many threads. In fact, I thought at first this was one of my prior threads.
Bottom line is that you have too much oil and need to have some removed. Next time, find a mechanic who works on AMG engines. Most (but not all) dealers now know what to do. Independent shops? Who knows.
Lovely, I wasn't sure if it was truly overfilled or just a over sensitive sensor. And if it can damage anything. I'll have to call them and see if they can look at it again. Sucks because it's a two hour drive round-trip. Thanks
Lovely, I wasn't sure if it was truly overfilled or just a over sensitive sensor. And if it can damage anything. I'll have to call them and see if they can look at it again. Sucks because it's a two hour drive round-trip. Thanks
I wouldn't drive 2 hours with overfilled oil. I'm assuming you already drove 2 hours back after the oil change. Too much oil can lead to too much pressure, oil leaks and potentially engine damage. Whatever you saved doing the oil change at this indy may come back to haunt you.
Last edited by superswiss; Apr 4, 2025 at 04:53 PM.
I wouldn't drive 2 hours with overfilled oil. I'm assuming you already drove 2 hours back after the oil change. Too much oil can lead to too much pressure, oil leaks and potentially engine damage. Whatever you saved doing the oil change at this indy may come back to haunt you.
Ya at that point OP should call roadside and tow it back to the dealership, it is less risky that way.
I wouldn't drive 2 hours with overfilled oil. I'm assuming you already drove 2 hours back after the oil change. Too much oil can lead to too much pressure, oil leaks and potentially engine damage. Whatever you saved doing the oil change at this indy may come back to haunt you.
Technically I drove one hour. It's two hours round trip. Didn't smell anything burning. Tech said he did follow the steps closely. And that a siphon straw can be used to take some oil out of the dipstick. Do you know if there is just a overfill warning that's in yellow and then one in red when it gets more serious? Also tech said the message should go away in the Service Messages display if it clears. All I've had to mess with in the service messages was the tire pressure. Which I can manually reset by holding down the scroll arrow. In the past I used to take my benz to dealership. But here in Arizona they are charging 1100-1400 for As and Bs. That's a bit ridiculous. In Utah they have the A special for 300. I don't mind paying more if the service is actually justified.
Technically I drove one hour. It's two hours round trip. Didn't smell anything burning. Tech said he did follow the steps closely. And that a siphon straw can be used to take some oil out of the dipstick. Do you know if there is just a overfill warning that's in yellow and then one in red when it gets more serious? Also tech said the message should go away in the Service Messages display if it clears. All I've had to mess with in the service messages was the tire pressure. Which I can manually reset by holding down the scroll arrow. In the past I used to take my benz to dealership. But here in Arizona they are charging 1100-1400 for As and Bs. That's a bit ridiculous. In Utah they have the A special for 300. I don't mind paying more if the service is actually justified.
The main concern is (again we are not sure how much it is overfilled) but if too much and the crank whips it like cream, it will damage the engine, foaming will occur and the engine oil cannot lubricate the engine properly.
Technically I drove one hour. It's two hours round trip. Didn't smell anything burning. Tech said he did follow the steps closely. And that a siphon straw can be used to take some oil out of the dipstick. Do you know if there is just a overfill warning that's in yellow and then one in red when it gets more serious? Also tech said the message should go away in the Service Messages display if it clears. All I've had to mess with in the service messages was the tire pressure. Which I can manually reset by holding down the scroll arrow. In the past I used to take my benz to dealership. But here in Arizona they are charging 1100-1400 for As and Bs. That's a bit ridiculous. In Utah they have the A special for 300. I don't mind paying more if the service is actually justified.
I'm not aware of there being a yellow and red warning for overfilling. Overfilling at any level is essentially not good. It's not like you'll smell anything burning. Oil will get into places where it shouldn't due to pressures being too high and create a mess with as said potential engine damage. Churning and foaming as said above is an issue, even with a dry sump. Oil blow-by is another with a dry sump. While some dealerships do charge questionable prices, there's something to be said about getting what you pay for as is evident here.
Technically I drove one hour. It's two hours round trip. Didn't smell anything burning. Tech said he did follow the steps closely. And that a siphon straw can be used to take some oil out of the dipstick. Do you know if there is just a overfill warning that's in yellow and then one in red when it gets more serious? Also tech said the message should go away in the Service Messages display if it clears. All I've had to mess with in the service messages was the tire pressure. Which I can manually reset by holding down the scroll arrow. In the past I used to take my benz to dealership. But here in Arizona they are charging 1100-1400 for As and Bs. That's a bit ridiculous. In Utah they have the A special for 300. I don't mind paying more if the service is actually justified.
here in toronto, for service A, i just told the dealer to do an express service, which is just engine oil/filter and doesnt include other unnecessary checks that they charge for since i recently bought the car and all the inspections were done anyway so you too can perhaps check with your dealer if they offer that.
here in toronto, for service A, i just told the dealer to do an express service, which is just engine oil/filter and doesnt include other unnecessary checks that they charge for since i recently bought the car and all the inspections were done anyway so you too can perhaps check with your dealer if they offer that.
Considering a new engine costs somewhere north of $70k US, more now with the BS tariffs, a properly done $1000 oil change looks like a bargain. Just saying.
My car was a trade in for a Vette. The Chevy dealer decided to change the oil for me as it was waiting for shipping. The rep contacted me and said they owed me an oil change but didn't really say why. Drove the car a mile from the shipping truck and saw the oil overfill light. I used an oil transfer hand pump like used for boats and ended up siphoning out over two quarts overfilled before I was able to get the lights out and get it to Mercedes for a proper oil change.
Easy fix, for sure they owe you back at least what you paid. Still need to go somewhere else and get it done again.
Today used a new independant shop to perform the "B" service on my 2020 GTc. Immediately after driving it got this message. Tech at shop hadn't seen this before and neither have I. Figuring, or hoping, it's just a sensor that fired off after changing the oil. Anyone??
I suggest that you start pumping 1/4 litter at a time until the level is correct.
I would than suggest questioning the Indy shop if they follow the proper AMG procedure? replace the necessary seals with OEM parts? and use the correct engine oil?
The following is a video showing the standard oil and filter change procedure.
These are the necessary OEM parts for the service:
007603-014106 Drain Plug Lower Seal
278-180-00-09-90 TS OIL FILTER
007603-012102 Oil Filter Housing Seal
000-989-79-02-19BIFU MB 229.5 SAE ENGINE OIL 5W-40 (7 liter). You can find the list of approved Engine Oils here: Mercedes-Benz Operating Fluids
178-014-03-00 Oil Reservoir Drain Plug
At the end of the video, you’ll see how the oil level is checked—it’s not like a typical car. This system uses a sump pump and an external reservoir. The engine oil needs to reach approximately 100°C (212°F) for the valve between the reservoir and engine to open. Once the oil circulates and levels equalize, only then can you get an accurate reading on the dipstick.
The above will help guide you on which questions to ask.
Have you physically checked the level in the oil tank? Follow the steps in the Operators Manual. I get this warning and when I check the level it is not overfilled.
Have you physically checked the level in the oil tank? Follow the steps in the Operators Manual. I get this warning and when I check the level it is not overfilled.
Sadly, OP's doesn't have a dipstick. That said, yes check the oil electronically in the instrument cluster.
This issue is more common than you think and I’ve even had it happen after an overpriced dealer oil change. They probably didn’t warm engine up enough prior to draining the oil (or let it cool down too long if they did) and likely all
of the old oil wasn’t drained out completely. Then ,they filled it with the correct amount but since there was app 1qt left in the system it’s now showing overfilled. Take large syringe or pump, place the tube in the fill/dipstick area and extract about .5 quart and then recheck. You’ll need to drive it around a bit and get it up to operating temps to see if that was enough.
This issue is more common than you think and I’ve even had it happen after an overpriced dealer oil change. They probably didn’t warm engine up enough prior to draining the oil (or let it cool down too long if they did) and likely all
of the old oil wasn’t drained out completely. Then ,they filled it with the correct amount but since there was app 1qt left in the system it’s now showing overfilled. Take large syringe or pump, place the tube in the fill/dipstick area and extract about .5 quart and then recheck. You’ll need to drive it around a bit and get it up to operating temps to see if that was enough.
I certainly recommend DIYing the engine oil next time, it is relatively easy, plus you know you it is done right.
Considering a new engine costs somewhere north of $70k US, more now with the BS tariffs, a properly done $1000 oil change looks like a bargain. Just saying.
Have you physically checked the level in the oil tank? Follow the steps in the Operators Manual. I get this warning and when I check the level it is not overfilled.
I had good news late Friday. Fired up the beast to take to a shop 5 minutes away. The overfill warning was no longer present. I still took to the shop and they physically checked the oil level (dipstick) and it was full but not over the max. I am still thinking when I drove off after service I punched it to beat traffic (prob dumb) and sensor went off. In the past my benz's seem to have sensor lights fire off more than usual. Thanks though for everyone's input.
here in toronto, for service A, i just told the dealer to do an express service, which is just engine oil/filter and doesnt include other unnecessary checks that they charge for since i recently bought the car and all the inspections were done anyway so you too can perhaps check with your dealer if they offer that.
Good idea. I just don't get why Mercedes is so sketchy about the Service A and B. I asked different dealerships and they never seem to know exactly what is done. I can't see how anything close to 1k is justified. Especially for my 15k and 25k services. Last indy guy said all my fluids and parts looked like a brand new car. I guess if I can't (or don't) want to service it myself I have to suffer.
Good idea. I just don't get why Mercedes is so sketchy about the Service A and B. I asked different dealerships and they never seem to know exactly what is done. I can't see how anything close to 1k is justified. Especially for my 15k and 25k services. Last indy guy said all my fluids and parts looked like a brand new car. I guess if I can't (or don't) want to service it myself I have to suffer.
It's not justified, but it's what enough people are willing to pay so MB dealerships will continue to charge it. Regarding your overfill, did you ask the indy shop how much oil they added when they changed the oil? Also, have you gone into the service/shop menu? On my car, it says exactly how much over your oil is so you can know how much you need to drain off. This is just one of the reasons I change my own oil even for a brand new car.
Keep in mind, warranties are void if they determine the damage is due to external influence such as a botched oil change. You'd have to fight with the indy to pay for the damage caused by their incompetence.
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