The oil flow control mod
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Joined: Jul 2020
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From: So CALi
| 2015 S63 / 2013 5.7 Tundra |
The oil flow control mod
Did the oil flow mod that disconnects the oil flow solenoid that cuts oil flow at low RPM, unplugging this solenoid restores full oil flow at all RPM's, and only caused a soft fault that did not cause a C E L. Well as part of a so called MB "emissions update", MB has changed it to a hard code, that now turns on the C E L. THANK PETE! once again Pete the "Benz Ninja" to the rescue, coded it out for me in about 30min. One of the best investment MB maintenance investments I've made.
Last edited by Bigg Willi; Dec 28, 2024 at 06:40 AM.
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Joined: Jun 2023
Posts: 54
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From: Santa Clara CA
2014 E63 S Sedan
Did the oil flow mod that disconnects the oil flow solenoid that cut oil flow at low RPM, unplugging this solenoid restres full oil flow at all RPM's and only caused a soft fault that did not cause a C E L. Well as part of a so called MB "emissions update", MB has changed it to a hard code, that now turns on the C E L. THANK PETE! once again Pete the "Benz Ninja" to the rescue, coded it out for me in about 30min. One of the best investment MB maintenance investments I've made.
https://mbworld.org/forums/w212-amg/...2080005-a.html
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Joined: Jul 2020
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From: So CALi
| 2015 S63 / 2013 5.7 Tundra |
Was your "emissions update" the one referred to in this post from the W212 forum for the M157 engine? Thanks.
https://mbworld.org/forums/w212-amg/...2080005-a.html
https://mbworld.org/forums/w212-amg/...2080005-a.html
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Did the oil flow mod that disconnects the oil flow solenoid that cuts oil flow at low RPM, unplugging this solenoid restores full oil flow at all RPM's, and only caused a soft fault that did not cause a C E L. Well as part of a so called MB "emissions update", MB has changed it to a hard code, that now turns on the C E L. THANK PETE! once again Pete the "Benz Ninja" to the rescue, coded it out for me in about 30min. One of the best investment MB maintenance investments I've made.
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Joined: Jan 2022
Posts: 182
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From: Jersey City
S63 Coupe
Mine is 2015. It won't affect sound but gives you better throttle response at lower rpm. Night and day difference.
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MBWorld God!
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I mean the update not the mod sorry for the confusion. Emissions updates sounds like they are trying to limit the function of the car, for example ruins the exhaust note.
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From: Your moms house
2015 S63 Coupe C217, 2008 C63(X), 2009 C300(X), 2003 SL55(X) , 2013 S550(X)
What is this emissions update you speak of and do you have any ideas what its called to remove it? I have a Star system so i can make changes just need a clue to get started 
. When i disconnected mine i got a hard fault and had to plug it back in so pretty sure mine has this update.
. When i disconnected mine i got a hard fault and had to plug it back in so pretty sure mine has this update. Last edited by crehop; Jul 14, 2025 at 12:50 PM.
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From: Jersey City
S63 Coupe
What is this emissions update you speak of and do you have any ideas what its called to remove it? I have a Star system so i can make changes just need a clue to get started . When i disconnected mine i got a hard fault and had to plug it back in so pretty sure mine has this update.
. When i disconnected mine i got a hard fault and had to plug it back in so pretty sure mine has this update.
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From: So CALi
| 2015 S63 / 2013 5.7 Tundra |
CEL came back, so I ended up getting a harness extension for the solenoid from the dealer, cut the unneeded end off the extension, loop soldered in a resistor that matched the resistance of the solenoid, plugged the modded harness into the stock harness, BINGO no more CEL.
Out Of Control!!
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
RESISTOR DUMMY-LOAD
CEL came back, so I ended up getting a harness extension for the solenoid from the dealer, cut the unneeded end off the extension, loop soldered in a resistor that matched the resistance of the solenoid, plugged the modded harness into the stock harness, BINGO no more CEL.
Did you experiment what current threshold the ECU calls "open circuit".
The limitation for me is the heat output...
1W ok
Over 5W is a hot stick that needs venting.
Perhaps use a 10W resistor for a 5W load...
ECU control is a PWM voltage at either 10%:OFF or 90%:ON of less than 14.9VDC.
After all this time, I still don't have a replacement load in place.
Overall the pump solenoid MOD experiment allows to test:
normal oil pressure where it was halved: MOD-1
effective oil pressure at driveability Rpm: MOD-X
Last edited by CaliBenzDriver; Oct 18, 2025 at 03:27 PM.
