When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
My DVM was set to 200 ohms. The closed switch readings for both the removed level sensor switch and the installed level sensor switch were the same, 0.8 ohms.
I mentioned @BenzNinja because if my IC needs to be re-initialized, it can only be done by someone that has access to Mercedes' servers.
Last edited by JettaRed; Aug 30, 2024 at 05:48 PM.
My DVM was set to 200 ohms. The closed switch readings for both the removed level sensor switch and the installed level sensor switch were the same, 0.8 ohms.
I mentioned @BenzNinja because if my IC needs to be re-initialized, it can only be done by someone that has access to Mercedes' servers.
You're right,
the WHOLE TIPPING POINT remains :
Sensor Level faulty BEFORE ECU
vs.
Level data becomes faulty AFTER ECU.
I hear you have good reasons to be leaning towards IC DISPLAY issue and we've seen your SCM may well be acting faulty.
It's interesting to see that IC-Display spends its time reading the ECU oil level data to display it.
Meaning the (known reliable) "A1 Module: Instrument Cluster" heavily relies on CAN-B to read data from ECU over CAN-C through busy CGW.
Last edited by CaliBenzDriver; Aug 30, 2024 at 07:11 PM.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by CaliBenzDriver
You're right, the WHOLE TIPPING POINT is still:
Sensor Level issue BEFORE ECU vs.
Level becomes faulty AFTER ECU.
I hear you are leaning towards DISPLAY issue.
Its interesting to see that IC-Display spends its time reading the ECU oil level data to display it. It's acting as an agent on driver's behalf.
Actually, the IC seems to control a lot of stuff. I go back to the list of errors (which I didn't list before but will now). Because I tried to enable oil level reporting on the IC menu, I may have hosed up other stuff. @BenzNinja likes to remind me that I shouldn't be futzing with stuff I don't fully know about. Also, these inexpensive scan tools can get you in trouble if you don't know what you are doing. Anyway, here are the errors. As you can see, they have IC malfunction in common. If I messed up the coding (as indicated in DTC C073600), that could be the cause of all of this.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Since doing the continuity testing as described by @S-Prihadi I have driven the car several times for distances and time greater than before when the warning message to Check Engine Oil would appear without it appearing. I don't know if disconnecting connector X26 No.4 and then checking continuity at Pin 13 on both sides of the connector (male and female) may have caused a reset of whatever condition was causing the problem, much like the chassis reset that @CaliBenzDriver always talks about. Hmmmm! Makes me wonder.
JR, you have the pulse of things, nothing MB is easy. This is like the chassis voltage YoYo: it's when you think you got it cornered that it comes back.
It's upsetting when so many systems disfunction.
At least your engine does not limp-mode when oil sensor goes missing AND you have the faithful dipstick as backup.
Wait to Reboot for a while or until bug shows up.
Hope it stays fixed
Last edited by CaliBenzDriver; Sep 1, 2024 at 01:02 AM.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
The interesting thing about the video above is that the first step is to physically check the oil level to determine if the warning can be dismissed (ignored). However, in the case in the video, it was a matter of everything working properly but that the oil level sensor sat too high in the oil and if you didn't fill to the max level you may get the warning. In my case either there needed to be some reset to the ECU logic or I need the IC re-initialized. When checking continuity on the ECU side of the X26, grounding pin 13 may have effectively reset something. Keeping fingers crossed. 🤞
On yachts with twin marine engine set up, yacht builder and engine OE, will adjust positioning of the oil dipsticks of BOTH engines to be in the inner (inboard) side or engine room middle walkway....
for ease of inspection.
As such the dipstick actual level marking height wise from its bottom of the disptick is not the same between Left and Right side engine.
What the engine manufacturer do when commissioning these two engines are, both engines are oil filled to target liters, example 27 liters as maximum.
They then insert the dipstick and see the oil level and then mark with 2 holes one as FULL and one more as LOW.
They use some sort of hole puncher. See below the dipstick level using 2 holes.
.
.
.
.
The video from MB is fine tuning oil level alarm, seems like how the marine engine I speak of get actual FULL level/height.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
It's been a couple of days without that annoying message to Check Engine Oil At Next Refueling. I decided to suction all the oil out and measure it. Let me say that I had thoroughly cleaned out the container before suctioning out the oil. I did that to avoid contamination of the oil because I was going to reuse it. There were less than 100 miles on the oil. It didn't look like honey, but it did look like pancake syrup. Ummm, ummm, good!
As you can see, it looks like 6.7 or 6.8 liters were drawn out. I then moved under the car and opened the drain plug, but no oil came out. I used my endoscope to look around inside the oil pan and saw oil was still slowly draining from the engine. But because the front of the car was raised and the drain plug is on the front side of the oil pan, it didn't flow out of the pan. If the car had been level, it would have drained completely.
It's still too soon to say this has been "fixed" but things are looking hopeful.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by BlownV8
In the end, you just needed to add more oil to get the light to go away?
No, because you could end up overfilling. If you watch that old video above, the first step is to verify the oil level is correct. If it is, then something else is malfunctioning. In the video, Mercedes issued an engineering change to the mounting bracket for the level sensor. However, there is no bracket in the more modern engines like my M276.
My conclusion is that you do need to be above the minimum measured on the dipstick according to MB's instructions (the oil needs to be at full operating temperature, the engine needs to be off for at least 5 minutes, the car needs to be level, and you need to wipe off the dipstick and reinsert it for at least 2 seconds). Secondly, in my case, I believe checking continuity of the wiring to the oil level sensor with the X26 No. 4 connector disconnected (pin 13) on the ECU side (gray connector) somehow reset some condition in the ECU. (See @S-Prihadi posts above.) I know it sounds illogical but ever since I did that the message has not appeared and I've driven far enough for it to have popped up.
If you experience this message and the oil is at the correct level, just try what I did. It's easy and doesn't cost anything.
You were adding 6.5L to an engine that was supposed to have 6.8L. That's why I recommend adding more oil at the start of the conversation. You have to be a good bit over the recommend amount to get a high oil message and I typically go around .5 quarts higher than the recommend amount as it creates a safety cushion. Glad you figured it out and had an adventure doing so.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by BlownV8
You were adding 6.5L to an engine that was supposed to have 6.8L. That's why I recommend adding more oil at the start of the conversation. You have to be a good bit over the recommend amount to get a high oil message and I typically go around .5 quarts higher than the recommend amount as it creates a safety cushion. Glad you figured it out and had an adventure doing so.
I appreciate your response. But the specified amount for the M276 according to the WIS is 6.5 liters (see below). However, based on what I suctioned out the second time, you have a point. What is not clear is does that capacity mean at the minimum mark, the maximum mark, or halfway between?
Last edited by JettaRed; Sep 2, 2024 at 05:16 PM.
Reason: added screenshot
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
I found this interesting. Using XENTRY Simulation, I found six error codes associated with the oil level sensor. I set them all to be CURRENT DTCs and ran the scan. Here are the results.
What this tells me is that the error codes for a malfunctioning oil level sensor can be ignored.
I appreciate your response. But the specified amount for the M276 according to the WIS is 6.5 liters (see below). However, based on what I suctioned out the second time, you have a point. What is not clear is does that capacity mean at the minimum mark, the maximum mark, or halfway between?
I assume you have been posting on your SL400 in your signature? If so, the fill level is in your owner's manual. It's actually 6.9L so I was a little off. Page 607 of the attached PDF or on page 604 of your owner's manual. You were just underfilling your engine.
I assume you have been posting on your SL400 in your signature? If so, the fill level is in your owner's manual. It's actually 6.9L so I was a little off. Page 607 of the attached PDF or on page 604 of your owner's manual. You were just underfilling your engine.
6.8 quarts is the recommended oil amount, and you added 6.5 quarts, correct? Is it low on the dipstick? If so, add, at least, another quart and see how it goes. I'm betting the last shop or person that did the oil added 8 to 8.5 quarts which is about average for many models and that's why you got 6.7 liters out. If it is happy at that level, again, give it another quart and monitor.
Used L when I should have used Q in the last post. The OP was putting in 6.5 quarts which is less than the recommended amount of 6.9 quarts. I pointed this out at the beginning of the thread, but I said 6.8 quarts based on memory.
Originally Posted by threeMBs
Actually it is 6.5L which is 6.9qt (you must have misread it). OP is correct.
This all started as the OP was underfilling his engine.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
6.5 liters or 6.9 US quarts. Regardless, the issue now appears to have been caused by some kind of signal glitch. Since checking continuity from the X26 connector to the oil level switch and to the ECU, the message has not reappeared. I am slightly overfilled, however. The oil level exceeds the maximum mark but does not touch the multi-strand metal part of the dipstick. Tomorrow morning I will pull out 100 ml at a time until I get the oil level to the maximum mark and see if the message comes back. Keep in mind, the car just turned over 50,000 miles and this is the first time I got that message in nearly 30,000 miles of ownership. I have always kept the oil near the maximum mark.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
