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W211 AMG Discuss the W211 AMG's such as the E55 and the E63

WHY WON'T MY TRANNY STAY IN M MODE?

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Old Dec 10, 2009 | 11:30 PM
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psuball1
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04 E55, 12 GL 450(wife)
WHY WON'T MY TRANNY STAY IN M MODE?
So I am driving my car tonight in M mode and when I get on it the car automatically switches to S mode. Has anyone else had this problem?
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Old Dec 10, 2009 | 11:38 PM
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2005 E55, 2009 VW GLI
might be caused by a bad oil sensor. merc knows about it.
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Old Dec 10, 2009 | 11:41 PM
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Godfather@ONE Autosport's Avatar
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E55 AMG
No idea... here's a question for you, somewhat on the subject, when you're in S mode, can you use the paddles to upshift and downshift, or do you have to be in M mode? I have to be in M mode, but my boy's E55's I forgot what year, upshifts and downshifts in S mode.. wtf..
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Old Dec 10, 2009 | 11:42 PM
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2003 W211 E55, 2003 W220 S600
Just a thought.
Do the sneaky ecu reset
Also get a mb dipstick tool and make sure the tranmission fluid is at the correct level
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Old Dec 10, 2009 | 11:54 PM
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2005 E55, 2009 VW GLI
here's what i'm talking about...

Date: June 20, 2008

Order No.: P-B-18.40/39

Supercedes:

Group: 18

SUBJECT:
Model 171.473, Equipped with Engine M113.989
Model 203.065, Equipped with Engine M112.961
Model 203.076, Equipped with Engine M113.988
Model 209.376/476, Equipped with Engine M113.987
Model 211.076/276, Equipped with Engine M113.990
Model 219.376, Equipped with Engine M113.990
Model 230.472, Equipped with Engine M113.995
Model 230.474, Equipped with Engine M113.992

Transmission Mode Changes from M to S


If you receive customer reports in the above model vehicles of the transmission mode changing by itself from M to S/C while driving, the engine oil sensor may be the cause. The engine control unit may contain no stored faults codes or the fault codes shown above. To resolve, install engine oil sensor A006 153 59 28.



hope this helps
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Old Dec 10, 2009 | 11:59 PM
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C55,SL55,C63
I would try this: Unplug the ECU wait 15 min then plug it back in. See if that helps. If not unplug the TCU. The TCU controls what mode you are in, like S, W, C, M, and what not. Pending on your car. There is a slight possibility the the TCU wires are coated with to much transmission fluid. This is common with MB TCU's. This maybe causing the issue. I would definitely unplug the ECU and if that fails do the same to the TCU.
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Old Dec 11, 2009 | 12:56 AM
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From: San Diego
04 E55, 12 GL 450(wife)
Originally Posted by Godfather@ONE Autosport
No idea... here's a question for you, somewhat on the subject, when you're in S mode, can you use the paddles to upshift and downshift, or do you have to be in M mode? I have to be in M mode, but my boy's E55's I forgot what year, upshifts and downshifts in S mode.. wtf..
My Car will shift up & down in S mode but it won't manually downshift in S mode like it does in M mode. That is weird that your car won't allow you to manually shift in M mode.
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Old Dec 11, 2009 | 12:59 AM
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From: San Diego
04 E55, 12 GL 450(wife)
Originally Posted by O-55
here's what i'm talking about...

Date: June 20, 2008

Order No.: P-B-18.40/39

Supercedes:

Group: 18

SUBJECT:
Model 171.473, Equipped with Engine M113.989
Model 203.065, Equipped with Engine M112.961
Model 203.076, Equipped with Engine M113.988
Model 209.376/476, Equipped with Engine M113.987
Model 211.076/276, Equipped with Engine M113.990
Model 219.376, Equipped with Engine M113.990
Model 230.472, Equipped with Engine M113.995
Model 230.474, Equipped with Engine M113.992

Transmission Mode Changes from M to S


If you receive customer reports in the above model vehicles of the transmission mode changing by itself from M to S/C while driving, the engine oil sensor may be the cause. The engine control unit may contain no stored faults codes or the fault codes shown above. To resolve, install engine oil sensor A006 153 59 28.



hope this helps
Thanks!! This may be it.
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Old Dec 11, 2009 | 01:04 AM
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From: San Diego
04 E55, 12 GL 450(wife)
Originally Posted by hooleyboy
I would try this: Unplug the ECU wait 15 min then plug it back in. See if that helps. If not unplug the TCU. The TCU controls what mode you are in, like S, W, C, M, and what not. Pending on your car. There is a slight possibility the the TCU wires are coated with to much transmission fluid. This is common with MB TCU's. This maybe causing the issue. I would definitely unplug the ECU and if that fails do the same to the TCU.
I will give my MB tech both this and O-55's post info. This should fix the issue.

Thanks for the feedback!!
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Old Dec 11, 2009 | 01:04 AM
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Mine upshifts and downshifts in both S and C mode - it's actually annoying to the wife because she downshifts to 4th all the time when turning because her finger hits the button on the back of the steering wheel. I personally love it because when I'm merging from 95 to the beltway - I drop it into 3 and. . .
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Old Dec 11, 2009 | 01:30 AM
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From: Glendale Arizona
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Originally Posted by motorkas
Mine upshifts and downshifts in both S and C mode - it's actually annoying to the wife because she downshifts to 4th all the time when turning because her finger hits the button on the back of the steering wheel. I personally love it because when I'm merging from 95 to the beltway - I drop it into 3 and. . .
This is my #1 gripe with the shift buttons. I hit it all the time. I'm getting real good at knowing when i hit it though. When my lady drives my car I always find myself shifting the car on out of the gear she is stuck in.
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Old Dec 11, 2009 | 05:31 AM
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04 E55 470 whp
Originally Posted by hooleyboy
This is my #1 gripe with the shift buttons. I hit it all the time. I'm getting real good at knowing when i hit it though. When my lady drives my car I always find myself shifting the car on out of the gear she is stuck in.
Mine shifts as well in both C and S modes.
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Old Dec 11, 2009 | 07:32 AM
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Originally Posted by psuball1
My Car will shift up & down in S mode but it won't manually downshift in S mode like it does in M mode. That is weird that your car won't allow you to manually shift in M mode.
no I can manually down and up shift with M mode only. But in S mode, paddles/buttons don't do anything. Maybe because I have an '03? I'm taking it to service soon anyway, so I'll get it looked at.
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Old Dec 11, 2009 | 08:40 AM
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My car does the same godfahter. I have an 03. When I am in S buttons don't do anything however I can down/up shift with the shifter when I am in S
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Old Dec 11, 2009 | 08:41 AM
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E55 AMG
Maybe it's an 03 thing then
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Old Dec 11, 2009 | 10:29 AM
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True, only 04-up can use the wheel buttons to shift in S mode. 03's can only use the buttons in M
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Old Dec 11, 2009 | 12:00 PM
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His wife crazy
My '03 is the same and I prefer it this way, if I want to use the paddles, it's easy enough to select M mode. No surprise shifts here.
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Old Dec 12, 2009 | 04:33 AM
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From: Abu Dhabi
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at first when i put my tranny in M mode. it used to go all the way to redline and then shifts by itself & on S/C mode i can use the paddles.

nut a noticed after i tuned it with PC, if it is in M mode. it wont shift. an arrow ( ^ ) shows when it reaches redline.

i like it like this more.

i think it is a software issue more than a hardware.

regards,
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Old Dec 14, 2009 | 02:39 AM
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i have the same exact issue you are having and have yet to resolve the problem. please post if you get it fixed.
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Old Jan 2, 2010 | 02:07 AM
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Any updates?
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Old Jan 2, 2010 | 08:15 PM
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04 E55, 12 GL 450(wife)
Originally Posted by hamann69
Any updates?
I have it going in on the 5th. I will let you know what happens.
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Old Feb 2, 2010 | 12:41 AM
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04 E55, 12 GL 450(wife)
so the tranny has been repaired and O-55 was right, bad oil sensor. I would recommend that anyone that has this issue should print this thread out and show your tech, if I would not have given this info to my tech he may not have figured it out.
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Old Aug 29, 2013 | 12:39 AM
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2004 E55 (sold) 2012 E350 4M
interesting
Last edited by rchase; Jan 22, 2014 at 01:35 AM.
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