Transmission won't hold manual mode
Thread Starter
Super Member
Joined: Jan 2017
Posts: 860
Likes: 80
From: Christchurch, New Zealand
CLS55
Transmission won't hold manual mode
Car keeps popping out of manual mode and into sport or comfort once engine and transmission get to operating temp. Trans seems otherwise complerely fine. The dealer thinks this is the tcu but I have two amd it persists! I have a faulty brake switch which they're replacing tomorrow. Could this be related?
Any help appreciated!
Cheers
Any help appreciated!
Cheers
Super Member
Joined: Feb 2007
Posts: 809
Likes: 74
From: Dallas, TX
2008 E63 wagon (1 of 62)
Doubt the brake switch and transmission mode issue are related. More than likely there is something going on with software or possibly something got into the physical switch near the shifter for changing modes and is giving you hell.
Member
Joined: Jul 2016
Posts: 183
Likes: 33
From: Joshua, TX
2004 AMG E55
Oil level sensor is in the oil pan. It has caused issues with transmission operation similar to what you are describing. Search these forums and you will see what I am talking about.
Thread Starter
Super Member
Joined: Jan 2017
Posts: 860
Likes: 80
From: Christchurch, New Zealand
CLS55
Ah engine oil sensor not transmission. Odd that its affects this. Thanks for the help I found a service bulletin using search. Here it is if anyone else needs it.
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.
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.
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Thread Starter
Super Member
Joined: Jan 2017
Posts: 860
Likes: 80
From: Christchurch, New Zealand
CLS55
Someone in one of the threads said that it was because the sensor spazticates, the engine thinks its getting low on oil so the computer tries to take control of the RPM's (I think it was to raise it) by taking control of the transmission back? Explains why the fault occurs most at idling or when letting off the POWER.
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Super Member
Joined: Sep 2016
Posts: 804
Likes: 62
E55 amg
Someone in one of the threads said that it was because the sensor spazticates, the engine thinks its getting low on oil so the computer tries to take control of the RPM's (I think it was to raise it) by taking control of the transmission back? Explains why the fault occurs most at idling or when letting off the POWER.
I would try a battery reset,it's a amazing what that trick does.
Super Member
Joined: Aug 2009
Posts: 998
Likes: 70
From: Oakland
W210 DRFT BNZ
Someone in one of the threads said that it was because the sensor spazticates, the engine thinks its getting low on oil so the computer tries to take control of the RPM's (I think it was to raise it) by taking control of the transmission back? Explains why the fault occurs most at idling or when letting off the POWER.
