tranny codes p0730 and p0732
Thread Starter
Senior Member
Joined: Sep 2013
Posts: 268
Likes: 37
From: near Birmingham, AL
2014 E350 Sedan; 2025 GLB 250
tranny codes p0730 and p0732
I have about 70k miles on my 2014 E350 and I was getting some clunky shifts so I took it in to have fluid and filter changed. Now I am getting some real bucking/lurching in 2nd gear - but only once per week or so. I ran my code reader and got P0730 and 0732 "There is an impermissible transmission ratio" and "Gear 2 is implausible or the transmission is slipping"
Any advice on how to proceed?
Any advice on how to proceed?
Out Of Control!!
Joined: Apr 2019
Posts: 11,924
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
short straw 🙄
Fresh ATF caused additional shifting issues.
Tranny issues are never good to ignore.
Try to reset the faults from built-in TCU to have a chance it will perform better.
Background information...:
-- Any additional faults on this car?
-- Your trusted MB dealer did this service or questionable ATF may be in use??
Tranny issues are never good to ignore.
Try to reset the faults from built-in TCU to have a chance it will perform better.
Background information...:
-- Any additional faults on this car?
-- Your trusted MB dealer did this service or questionable ATF may be in use??
Thread Starter
Senior Member
Joined: Sep 2013
Posts: 268
Likes: 37
From: near Birmingham, AL
2014 E350 Sedan; 2025 GLB 250
Fresh ATF caused additional shifting issues.
Tranny issues are never good to ignore.
Try to reset the faults from built-in TCU to have a chance it will perform better.
Background information...:
-- Any additional faults on this car?
-- Your trusted MB dealer did this service or questionable ATF may be in use??
Tranny issues are never good to ignore.
Try to reset the faults from built-in TCU to have a chance it will perform better.
Background information...:
-- Any additional faults on this car?
-- Your trusted MB dealer did this service or questionable ATF may be in use??
To answer your questions, I bought trans kit from FCP Euro and brought it to local indy (non-euro) and let him change it.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
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From: North Scottsdale, AZ
'71 Pinto
https://www.engine-codes.com/p0732_mercedes-benz.html
MB (0730 not listed):
0729 The gear is implausible or the transmission is slipping. (6)
0731 The gear is implausible or the transmission is slipping. (1)
0732 The gear is implausible or the transmission is slipping. (2)
0733 The gear is implausible or the transmission is slipping. (3)
0734 The gear is implausible or the transmission is slipping. (4)
0735 The gear is implausible or the transmission is slipping. (5)
MB (0730 not listed):
0729 The gear is implausible or the transmission is slipping. (6)
0731 The gear is implausible or the transmission is slipping. (1)
0732 The gear is implausible or the transmission is slipping. (2)
0733 The gear is implausible or the transmission is slipping. (3)
0734 The gear is implausible or the transmission is slipping. (4)
0735 The gear is implausible or the transmission is slipping. (5)
Out Of Control!!
Joined: Apr 2019
Posts: 11,924
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
acting sick
> Resets:
The super fancy Siemens transmission computer has many levels of resets with learnings shift adaptations.
The faults you got are genuine true concern... they are not false faults because your driving experience confirms the goofy shifts.
Try resetting TCU with your simple scanner for peace of mind. Dont expect a miracle in this case.
Double check your coolant tank to see you have no traces of ATF MAYO MIXED in there (radiator ATF heat exchanger failure).
> Decision fork:
-- It's up to you to decide to get a guaranteed proper ATF service done before considering more expensive options.
-- or get a quick conductor plate worked on by a certified shop with MB tools.
-- or clutch packs require tranny drop for complete overall work.
🤞
Last edited by CaliBenzDriver; Mar 11, 2023 at 06:53 PM.
MBWorld Fanatic!
Joined: Apr 2006
Posts: 4,694
Likes: 1,829
From: Dallas-Ft.Worth,TX
2016 E350 Sport
Clear the codes, then reset the transmission computer per this procedure... https://mbworld.org/forums/e-class-w...ton-start.html
This makes the adaptive transmission relearn how to shift from a factory setting. If that doesn't work, then consider the more invasive ideas above.
This makes the adaptive transmission relearn how to shift from a factory setting. If that doesn't work, then consider the more invasive ideas above.
MBWorld Fanatic!
Joined: Dec 2020
Posts: 2,412
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From: 122W, 37N
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
I'm not sure I'd trust a 'non euro indy' to do a transmission service on a Mercedes. They won't have the documentation on how to do it properly
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Thread Starter
Senior Member
Joined: Sep 2013
Posts: 268
Likes: 37
From: near Birmingham, AL
2014 E350 Sedan; 2025 GLB 250
I can't believe I never followed up with the resolution. Calibenzdriver was correct. The indy mechanic left it 2 quarts low. I took it to MB Birmingham; they diagnosed the low fluid and added 2 quarts. Drives great now. Hopefully, no lasting damage was done.
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Out Of Control!!
Joined: Apr 2019
Posts: 11,924
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
WHEN CHEAP GETS EXPENSIVE...
Make a point to research a better MB specialist near your location. Specialists use the right procedure and more appropriate parts than cheap local distributors.
To test your new selection:
Keep up with all fluid replacement schedule and ignition tune ups.
Last edited by CaliBenzDriver; Mar 12, 2025 at 06:27 PM.
MBWorld God!
Joined: Dec 2019
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Likes: 6,281
You did get lucky... sometimes clowns rush to use the wrong ATF to produce more repairs.
Make a point to research a better MB specialist near your location. Specialists use the right procedure and more appropriate parts than cheap local distributors.
To test your new selection:
Keep up with all fluid replacement schedule and ignition tune ups.
Make a point to research a better MB specialist near your location. Specialists use the right procedure and more appropriate parts than cheap local distributors.
To test your new selection:
Keep up with all fluid replacement schedule and ignition tune ups.
Out Of Control!!
Joined: Apr 2019
Posts: 11,924
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
-- cold ATF not at operation temp
-- aluminum pan bolts torqued with impact driver
--....
MBWorld God!
Joined: Dec 2019
Posts: 32,224
Likes: 6,281
