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WOW, thank you all so much for sharing this. I've been driving MB for 20+years, the 276/ 278 for awhile, probably 6+ 320/350/400/550 and was not aware of this at all. Just disconnected by sensor from my CLS550, scanned for codes, got the P06DA00 and took it for a test ride. Man she rips! It has always been a spirited car and its not like a tune but it is much more responsive to me and my SOTP dyno feels improved. I also have piece of mind I have proper oil pressure at all times not just when I'm stomping on it, frankly I'm doing 70 on backroads and I'm only at 1700ish RPM. Anyway, thanks for the heads up on this tweak. Now I can't wait for my wife to be home to "force a code" on her ML400. Thanks again, Tim
Tim, great feedback! Your engine is going to keep delivering more free improvements as it seals up.
ECU will notice that and hand over more gas on-demand.
Rock solid accelerator instead laggy slowpoke
5k Mi oil change should from now on no longer be burned black.
👏
Last edited by CaliBenzDriver; Mar 15, 2024 at 02:38 AM.
'18 GLC 300 4MATIC AMG Line Night Pkg designo Nappa leather M274 Oil Solenoid mod Dinan Sport Tune
Thanks!
Thank you for all the research and validations! I confidently pulled the plug on my 2018 GLC 300 with the M274. I'm a go for normal oil pressure.
Indeed, the piston oil squirters must now be active at lower RMPs as the car comes up to temp so much quicker. My engine is noticeably smoother and responsive in every way. A wonderful discovery. Thanks again.
Disconnected!
Top view
Used a rubber cap to ward off the elements
Ran connector up and away from moving parts
Added a rubber cap to the connector and zip tied it into place
No CEL on the dash after a couple hundred miles of grins. I will check for and expect the P06DA00 code when I change my oil at 5K miles here in a bit. So thrilled with this mod.
Thank you for all the research and validations! I confidently pulled the plug on my 2018 GLC 300 with the M274. I'm a go for normal oil pressure.
Indeed, the piston oil squirters must now be active at lower RMPs as the car comes up to temp so much quicker. My engine is noticeably smoother and responsive in every way. A wonderful discovery. Thanks again.
..../...
No CEL on the dash after a couple hundred miles of grins. I will check for and expect the P06DA00 code when I change my oil at 5K miles here in a bit. So thrilled with this mod.
Great, now you have seen the light. Your engine is now able to run with improved oil pressure.
Currently your active piston cooling remains limited to above 2000.RPM by low viscosity. The $5 fix is simple.
Before you replace your new 5w40 oil, test a booster shot to cancel limited cooling. Read here!
HOW: Simply dump about half a quart of 15w50 in your existing 5000.Mi old oil. Then drive and let ECU adapt your engine VVT torque and new shifts points.
--> Notice extreme heat becoming normal with effective piston spraying. Now spraying becomes effective below 2k.RPM for everyday driving speed.
You need to park in an indoor enclosed garage to feel the difference - Coolant gauge won't show any difference.
Say goodbye to leaky sensors, burned oil and scored cylinders - Nice and easy from your friends at MBW.
Last edited by CaliBenzDriver; Mar 22, 2024 at 06:28 PM.
This is a very interesting thread. As someone whom has extensive background with German cars..... How many miles have you all now gone with the solenoid just disconnected?? This fault will never set the Light? I personally own a GLC300 and after reading this will try unplugging it and see what happens over the next day or so.
update: From what I Take, it must be dependent on software level. As soon as mine is unplugged, then check engine light is on. I have also seen multiple cars with check engine lights on and this is the only code. once the harness is replaced, The light is off. Hence, why i'm asking does it depend on software calibration?
Last edited by GermanAuto4959; Apr 9, 2024 at 12:05 PM.
This is a very interesting thread. As someone whom has extensive background with German cars..... How many miles have you all now gone with the solenoid just disconnected?? This fault will never set the Light? I personally own a GLC300 and after reading this will try unplugging it and see what happens over the next day or so.
Since you have a GLC300, likely a M274 engine. That engine is the poster boy for the "ignore the hidden code if your oil pump already delivers pressure". Check the original TSB by MB.
Now on how long has a car been tested explicitly, or unknowingly without the solenoid. Here is a video with YouTuber experience after 10K miles.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by GermanAuto4959
This is a very interesting thread. As someone whom has extensive background with German cars..... How many miles have you all now gone with the solenoid just disconnected?? This fault will never set the Light? I personally own a GLC300 and after reading this will try unplugging it and see what happens over the next day or so.
update: From what I Take, it must be dependent on software level. As soon as mine is unplugged, then check engine light is on. I have also seen multiple cars with check engine lights on and this is the only code. once the harness is replaced, The light is off. Hence, why i'm asking does it depend on software calibration?
Interesting! The only other cars we've seen are S63s (I believe) that have the CEL come on with the solenoid disconnected. The fix for the CEL is to get a cheap spare solenoid (try AliExpress) and attach that to the dangling engine harness. All sorts of info on the crazy long thread on what to do.
This is a very interesting thread. As someone whom has extensive background with German cars..... How many miles have you all now gone with the solenoid just disconnected?? This fault will never set the Light? I personally own a GLC300 and after reading this will try unplugging it and see what happens over the next day or so.
update: From what I Take, it must be dependent on software level. As soon as mine is unplugged, then check engine light is on. I have also seen multiple cars with check engine lights on and this is the only code. once the harness is replaced, The light is off. Hence, why i'm asking does it depend on software calibration?
'18 GLC 300 4MATIC AMG Line Night Pkg designo Nappa leather M274 Oil Solenoid mod Dinan Sport Tune
Check Engine Light may vary
Originally Posted by GermanAuto4959
This is a very interesting thread. As someone whom has extensive background with German cars..... How many miles have you all now gone with the solenoid just disconnected?? This fault will never set the Light? I personally own a GLC300 and after reading this will try unplugging it and see what happens over the next day or so.
update: From what I Take, it must be dependent on software level. As soon as mine is unplugged, then check engine light is on. I have also seen multiple cars with check engine lights on and this is the only code. once the harness is replaced, The light is off. Hence, why i'm asking does it depend on software calibration?
Hi, I have attached the latest info I could find on this code for the M274 engine. Correct, from this document, the engine light triggering with just this P06DA00 code seems to be dependent on model year, and software level.
On my 2018 GLC 300 I do not get the check engine light displayed with the harness to the solenoid unplugged. I do see the code present with my Autel scanner. I had my car into my local MB dealer last week. With their full scan and inspection, they reported that "no codes are present". So, they disregarded that code because I know that it is there. I doubt they noticed the wire unplugged, and I did not say anything. They recommended a transmission service in the fall. That's it.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by scaryfast
On my 2018 GLC 300 I do not get the check engine light displayed with the harness to the solenoid unplugged. I do see the code present with my Autel scanner. I had my car into my local MB dealer last week. With their full scan and inspection, they reported that "no codes are present". So, they disregarded that code because I know that it is there. I doubt they noticed the wire unplugged, and I did not say anything. They recommended a transmission service in the fall. That's it.
That confirms that dealerships are following the TIPS instructions to ignore the code. Hmmmm!
WRT the tranny service, how many miles and time since the last service? It's a service I would not skip. Maybe your dealership will allow you to provide the parts (FCP Euro sells the complete kit with OEM parts) and you can save about $100. Mine was kind enough to allow me to provide parts and pay only for labor.
'18 GLC 300 4MATIC AMG Line Night Pkg designo Nappa leather M274 Oil Solenoid mod Dinan Sport Tune
Originally Posted by JettaRed
That confirms that dealerships are following the TIPS instructions to ignore the code. Hmmmm!
WRT the tranny service, how many miles and time since the last service? It's a service I would not skip. Maybe your dealership will allow you to provide the parts (FCP Euro sells the complete kit with OEM parts) and you can save about $100. Mine was kind enough to allow me to provide parts and pay only for labor.
Yes, I can check with my dealership on the option to provide parts. The transmission service was completed on Dec 10 2022 at 66,758 miles. I currently have 80,112 miles.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by scaryfast
Yes, I can check with my dealership on the option to provide parts. The transmission service was completed on Dec 10 2022 at 66,758 miles. I currently have 80,112 miles.
2017, and I also unplugged a 2018 Glc 300 here and the check engine light immediately came on also, cannot clear. So they must have done an update to software on some of these including mine, it was at a dealer under CPO, with the fault present and they rectified it, new harness, solenoid, and software. I was also thinking of buying a cheap sender and just externally plugging it in. Anyone try that?
'18 GLC 300 4MATIC AMG Line Night Pkg designo Nappa leather M274 Oil Solenoid mod Dinan Sport Tune
Originally Posted by GermanAuto4959
2017, and I also unplugged a 2018 Glc 300 here and the check engine light immediately came on also, cannot clear. So they must have done an update to software on some of these including mine, it was at a dealer under CPO, with the fault present and they rectified it, new harness, solenoid, and software. I was also thinking of buying a cheap sender and just externally plugging it in. Anyone try that?
Yes, I purchased a solenoid from AliExpress for $21 just to have in case I needed to connect it to the engine harness wire to remove the error code for a CEL or dealership work. I've seen others cover the solenoid end with shrink tubing and some silicone caulk and then zip tie it in a safe place connected.
[QUOTE=scaryfast;8953120]Yes, I purchased a solenoid from AliExpress for $21 just to have in case I needed to connect it to the engine harness wire to remove the error code for a CEL or dealership work. I've seen others cover the solenoid end with shrink tubing and some silicone caulk and then zip tie it in a safe place connected.
That's awesome, I'm ordering one now. I'll plug it in and tie it away.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by GermanAuto4959
2017, and I also unplugged a 2018 Glc 300 here and the check engine light immediately came on also, cannot clear. So they must have done an update to software on some of these including mine, it was at a dealer under CPO, with the fault present and they rectified it, new harness, solenoid, and software. I was also thinking of buying a cheap sender and just externally plugging it in. Anyone try that?
Installed!
Now to see if this does anything noticeable. I see in previous comments, quieter start up? Better response?
Welcome!
This experimental testing likely voids warranty coverage and may result in total loses. I dont recommend anyone to test MOD's. In California air causes cancer and idiots chase police in the streets...
Welcome!
This experimental testing likely voids warranty coverage and may result in total loses. I dont recommend anyone to test MOD's. In California air causes cancer and idiots chase police in the streets...
Experimental testers have reported differences based on engine types and oil viscosity.
Benefits may be those associated with better circulation of an "MB-Approved oil" :
Reduced power losses
Advanced GDI injection timings
Minimal crankcase blow-by pressure
Improved vacuum boosted brakes!
Normalized piston heat
Possible prevention of scored bores
Unburned oil normal service life
Unburned spark coils and CPS oil leaker
Your mileage will vary ie. No assumed claims of fitness to current engine condition... specifically oil sump cleanliness.
"MB Approved oil" is though essential to retain "dry-lube package" benefits.
I have customers whom have been driving around with this fault code in their M274s for thousands of miles with no issues. My GLC was actually "Fixed" about 8 months ago. the engine internally is very clean, always has had oil changes every 6 months regardless of how under the mileage it has been since day one. Now has 42,001 miles on it. The labor is pretty big charge to my customers to "fix" this. Two vehicles with m274s here currently are in an open circuit stage and hasn't caused any issues. One has a CEL on due to it (been that way for 20,000 miles or so). She doesn't want to spend big to fix it, I may just do this for her and explain the situation. So Far though, I've not really noticed any difference in my car. I also use Motul 8100 Xmax 0w-40.
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.
A wonderful discovery. Thanks again.
Original ( 
