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STORED. I happen to also be using a BlueDriver dongle to check the readiness codes.
Maybe this could be from that?
Yes, it's from connecting to the DLC.
While you have the belly pans removed to replace your engine oil sensor, look at what @juanmor40 has just posted for W213 here. time to seal that up ASAP
The leaky connectors are getting acknowledged by steering rack recalls... unnecessary to procrastinate before RTV SILICONE connectors!!
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Started to replace the oil level sensor today since the darn message popped up again. As you can see, however, I suctioned out nearly 6.5 liters, which is the exact amount that should be in the engine.
I got to the point where I had all the little bolts for the lower oil pan removed and couldn't get the pan to budge. There is a nut welded to the lower oil pan where I believe you can use one of the screws (bolts) to lever the pan loose. You insert the screw and turn it against the upper oil pan, and it should push the pan off. (See the red arrow in picture of pan below.)
I then remembered that I had been futzing around with changing variants in the Instrument Cluster (using my LAUNCH Creader scanner) and had changed a value for Oil Level Indicator from No Oil Level Indicator to Oil Level In Trip Computer Menu. If the car wasn't set up from the factory to have the oil level displayed (like it did on my 2004 SL500 with no dipstick and everything was electronic), that may be why I have these periodic messages to Check Engine Oil... I have since changed it back to what it was (see below). If the message shows up again, I will proceed with replacing the oil level sensor. If it doesn't show up again, I will know that it was my futzing around that caused these false alarm messages.
By the way, that message is triggered by low oil level according to the Operator's Manual. And since the oil level sensor appears to be simple a switch activated by a float inside it, in a real low oil level situation, that is a carelessly underrated warning. I mean, who the hell pulls out their Operator's Manual and searched for that specific warning?
Last edited by JettaRed; Aug 28, 2024 at 08:32 PM.
Started to replace the oil level sensor today since the darn message popped up again. As you can see, however, I suctioned out nearly 6.5 liters, which is the exact amount that should be in the engine.
I got to the point where I had all the little bolts for the lower oil pan removed and couldn't get the pan to budge. There is a nut welded to the lower oil pan where I believe you can use one of the screws (bolts) to lever the pan loose. You insert the screw and turn it against the upper oil pan, and it should push the pan off. (See the red arrow in picture of pan below.) https://cimg6.ibsrv.net/gimg/www.mbw...6974cd937e.png
I then remembered that I had been futzing around with changing variants in the Instrument Cluster (using my LAUNCH Creader scanner) and had changed a value for Oil Level Indicator from No Oil Level Indicator to Oil Level In Trip Computer Menu. If the car wasn't set up from the factory to have the oil level displayed (like it did on my 2004 SL500 with no dipstick and everything was electronic), that may be why I have these periodic messages to Check Engine Oil... I have since changed it back to what it was (see below). If the message shows up again, I will proceed with replacing the oil level sensor. If it doesn't show up again, I will know that it was my futzing around that caused these false alarm messages.
By the way, that message is triggered by low oil level according to the Operator's Manual. And since the oil level sensor appears to be simple a switch activated by a float inside it, in a real low oil level situation, that is a carelessly underrated warning. I mean, who the hell pulls out their Operator's Manual and searched for that specific warning?
On newer MBs, I guess those equipped with MBUX or newer versions of COMAND like NTG 5.5 has like an "i" beside the message which you press "OK" and it loads the digital operator's manual and then jumps to the page related to the issue for troubleshooting.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Well, turning the oil level indicator completely off didn’t work. I did find an old backup of the IC I had made a while ago and did a restore. Waiting to see if that fixes it. Again, replacing the oil level sensor remains a next step.
Last edited by JettaRed; Aug 29, 2024 at 10:50 AM.
Well, turning the oil level indicator completely off didn’t work. I did find an old backup of the IC I had made a while ago and did a restore. Waiting to see if that fixes it. Again, replacing the oil level sensor remains a next step.
Hmmm I see, is there an actual picture of this float/oil sensor thing?
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
It's an easy replacement on the M276. Lower oil pan is unobstructed. I got the part from FCP. The most time-consuming part is cleaning off the old gasket material.
It's an easy replacement on the M276. Lower oil pan is unobstructed. I got the part from FCP. The most time-consuming part is cleaning off the old gasket material.
I see, that is good news then : ) It is a nice thing that our M276 engines are both reliable and easy to repair, the latter being the icing on the cake : )
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Ugh! I still get that message after replacing the level sensor. And we know that the car is actually not low on oil. So, it is either in the logic or for some reason the sump drains empty when driving. Not sure how that happens since the float device fits into the upper pan. If the oil was not draining back, where would it be? There is no oil in the coolant and vice versa. I installed a new filter in case there was something whacky with the one I had just put in when this stuff started happening.
It's raining like crazy now, so I'm not going to check for DTCs. When checking before, there were none except something about the IC needing configuration. They all seem tied to the IC. I think I will run the DTC through XENTRY Simulation to see what tests, configurations, or actuations need to be done. Tomorrow I will hook up my SDS (XENTRY) and run some tests. There is an Adaptation called "Initial startup of already install control unit" but it seems to require SCN coding and connection to Mercedes servers. Maybe it's time to reach out to @BenzNinja
Last edited by JettaRed; Aug 29, 2024 at 09:45 PM.
New sensor with little improvement... what gives?
No worries, now this is one sensor that wont expire on you soon like a helpless CKP by the roadside.
JR's scanner to the rescue: you've got VIP faults!
Your fault collection make this look like your cluster is acting up, not the oil sensor attached to ECU.
Besides your SCM is also upset and awaiting for new module or simple soldering.
It's possible that SCM is what's screwing with your IC-Display networking...
-1- What will sort this out is to confirm ECU has no issue with oil sensor while the Display does.
-2- It may be that SCM is preventing CAN-B Display from networking with ECU CAN-C....
Guess what's lays between these two:
the CentralGateWay crossroads.
You can dig up the fault setting criteria in XENTRY to understand the true conditions for these faults.
Last edited by CaliBenzDriver; Aug 29, 2024 at 11:31 PM.
New sensor with NO improvement. By the way, what is "SCM"? Thanks
Steering Control Module a busy major solderless module. I fixed SCM at once wit EIS (Ignition slot) and I think it opened up my eye with better tranny shifting and the rack planted straight at highway speed instead of light and wandering.
Lets make sure what's wrong before branching out, yes?
Can you read the "oil level" datastream from ECU then at Display ?
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by CaliBenzDriver
Steering Control Module a busy major solderless module. I fixed SCM at once wit EIS (Ignition slot) and I think it opened up my eye with better tranny shifting and the rack planted straight at highway speed instead of light and wandering.
Lets make sure what's wrong before branching out, yes?
Can you read the "oil level" datastream from ECU then at Display ?
I have not been able to scan when the message pops up more than once, and then I did not check the oil level. However, when checking the oil level in the ECM live data it reports NORMAL. I will try the next time it happens.
I am back at my man cave last nite from Bali.
What a nice view a 27" inch twin monitors are, compared to by 15" super small laptop screen......
Now I can help you better Jetta, with my PC at home where my data is at.
The oil level switch is a simple and seems to be a normally open switch. Single wire, grounded type switching.
Try playing with the removed oil level sensor, flip it to active it. Use continuity test.
Next test will be to make sure the wire from ECM to X26 no 4 intermediate connector and X26 to Oil Switch S43 is not wounded and give intermittent short to ground, causing false DTC.
If there is any wire wounded, it would be X26 to S43 section, which has to pass thru more "rugged" terrain.
Trace and shake wire while grey X26 connector is disconnected from black X26.....and use Continuity beeper at black X26 pin 13 to groundat the S43 sensor side or any other ground is okey.
Pin 13 is the most important one.
X26 no 4. At Bank 1 front, near aftercooler baby coolant bottle.
Grey X26 is to ECM, Black X26 is to sensors.
.
.
Yes, there is no X26 no 3..... . It is what it is.
Have fun..............
Last edited by S-Prihadi; Aug 30, 2024 at 12:55 AM.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Thanks, @S-Prihadi . To be clear, there are no stored DTCs when this occurs. I will however, run your tests and check for bad wiring.
The peculiar thing is that this started immediately after the last oil change. Searching the message on YouTube came up with a couple of videos in which COMMENTS included this happening immediately after an oil change. (You'll have to expand responses to a comment. "...The same here, did the oil and filter yesterday, and that message popped up about 15 mins after I started the engine. The oil level is definitely between the min and max marks. It's really annoying... Do you guys have any idea what might be the cause?"). There was one comment about a loose wire.
Thanks, @S-Prihadi . To be clear, there are no stored DTCs when this occurs. I will however, run your tests and check for bad wiring.
I doubt any DTC will occur from a supposedly ground switched oil level switch , if the wire is wounded and touch ground.
ECM will assume it is the oil level warning in progress.
I think if the float switch is a dummy one, meaning ON or OFF state only, we must first confirm its operational method.
01. Is it ON when oil level is proper and OFF when oil level is below is target height/depth ?
02. Or it is opposite of #1 ?
You can test your old float switch using the same engine oil you are using, in a container to see if it is #1 or #2 ?
03. Can it be it has two position switching method, where the second one has resistor to differentiate the two levels ?
Example : Level 1, no resistor. Level 2 uses resistor. This is a cheap way to have 2 level indicator using single wire grounded switching.
I wonder what is the rectangular item I marked in red. I mean what does it represent ?
Both M276.9 or M276.8 or M272 or M273 or M278, uses the same P/N for oil level switch.
A simple switch diagram, S43 of M271.8 EVO engine W212 E200/E250 or W204 C200 / C250.
No rectangular thingy....
Why I raise question #3 is because I am wondering, can our oil level switch work while engine is running ?...where oil level will be reduced because some are in circulation and in oil filter etc etc.
If it has 2 level switching, it may be able to work with engine running.
The older M271 of W203 has a true oil level sensor and oil quality sensor called B40 ( not LIN based yet ).... not a dumb oil level switch like ours called S43.
M157 certain type, has the newer LIN based B40 and with oil temperature.
Go and experiment Jetta, while u have the oil level switch in hand...please.
.
Last edited by S-Prihadi; Aug 30, 2024 at 01:03 PM.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Well, I checked continuity with the switch OPEN (i.e., float at bottom) and with the switch closed (float at top). I did this with the switch I removed and flipped it over and back. Because of the way the switch is mounted in the oil sump area, it is oriented up and the float inside will be down without oil. It is a simple on/off switch.
Measuring the ohms on pin 13 in the X26 black connector (with reference to chassis ground), I measure 0.8 ohms. This matched the reading for the removed switch when upside-down (simulating float).
Closed circuit to ground with switch installed in car. X26 No. 4 pin 13 Ground to engine Closed circuit continuity with float in closed position on removed switch.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by S-Prihadi
I doubt any DTC will occur from a supposedly ground switched oil level switch , if the wire is wounded and touch ground.
ECM will assume it is the oil level warning in progress. If the wire is damaged and shorting out, wouldn't that represent a closed circuit to ground, just like when oil is at proper level. FWIW, my engine seems unusually clean for 50,000 miles.
I think if the float switch is a dummy one, meaning ON or OFF state only, we must first confirm its operational method.
01. Is it ON when oil level is proper and OFF when oil level is below is target height/depth ? The switch is closed when the oil is at the proper level.
02. Or it is opposite of #1 ?
You can test your old float switch using the same engine oil you are using, in a container to see if it is #1 or #2 ? I just flipped it upside-down. There is a small witness hole in the side that you can see the float. I assume that is to ensure no air gets trapped.
03. Can it be it has two position switching method, where the second one has resistor to differentiate the two levels ?
Example : Level 1, no resistor. Level 2 uses resistor. This is a cheap way to have 2 level indicator using single wire grounded switching.
I wonder what is the rectangular item I marked in red. I mean what does it represent ? It certainly looks like a resistor on the schematic, but with the switch open, resistance is infinite. UNLESS the resistor is to ensure electric current does not pass through the oil.
Both M276.9 or M276.8 or M272 or M273 or M278, uses the same P/N for oil level switch.
A simple switch diagram, S43 of M271.8 EVO engine W212 E200/E250 or W204 C200 / C250.
No rectangular thingy.... We have seen other errors on Mercedes schematics.
JR, you are almost there... no way to quit on simple stuff!
We know the new sensor is proven good.
oil level sensor ECU circuit
This ECU sensor has fail-safe conditions....
"sensor= GND/Low" is oil level is ok
"sensor= R-Value/Interm." is oil is low
"sensor= Open/High" is harness error
Meaning to get an oil level sensor warning the ECU is not seeing straight GND input either partial-R or open.
How can that happen...
Poor harness connections ??
(ECU unlikely to have bad engine GND in this case)
> IF ECU INPUT FAIR....
Once you are confident the sensor circuit is fair then question what comes after ECU that may provide false for a proven good input...
the IC-Display?
Last edited by CaliBenzDriver; Aug 30, 2024 at 04:17 PM.
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.
. It is what it is.
