1996 E320 stuck in Limp mode?
Thread Starter
Newbie
Joined: Feb 2010
Posts: 12
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From: Cebu, Philippines
1996 E320 I6 (Japan import) (722.5 tranny)
1996 E320 stuck in Limp mode?
Hi all, I'm very new to the forum and I just need some confirmation here. I just got a '96 e320, it seems like the transmission is stuck in limp mode i think.. Power is terrible if i stick into drive, if I downshift it manually into 2nd then power is awesome. When i drive the RPM's won't go past 4,000 and it feels like it's starting out in 3rd gear cuz the power off the line really is terrible. Now, when i even rev the engine in park, it limits at 4,000 rpm.. Is that normal?
My questions are, is my transmission in limp mode? i can go manually in 2nd, 3rd then drive and there is plenty of power but when in just drive, no off the line power and even when i floor it it won't go past 4k rpm on the downshift if there even is a downshift.
shifting in any gear, rather it be from park to reverse to even 2nd or 3rd or drive is VERY smooth... I also had the car scanned before i bought it but no codes at all.
I appreciate any input from you gentlemen. thanks<input id="gwProxy" type="hidden"><!--Session data--><input onclick="jsCall();" id="jsProxy" type="hidden">
My questions are, is my transmission in limp mode? i can go manually in 2nd, 3rd then drive and there is plenty of power but when in just drive, no off the line power and even when i floor it it won't go past 4k rpm on the downshift if there even is a downshift.
shifting in any gear, rather it be from park to reverse to even 2nd or 3rd or drive is VERY smooth... I also had the car scanned before i bought it but no codes at all.
I appreciate any input from you gentlemen. thanks<input id="gwProxy" type="hidden"><!--Session data--><input onclick="jsCall();" id="jsProxy" type="hidden">
Last edited by cccullen; Mar 7, 2010 at 07:17 PM.
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Joined: Oct 2007
Posts: 1,564
Likes: 19
From: SoCal
98 Brilliant Silver E320 Wagon
Hi and Welcome -
Generally, Limp Home Mode only provides 2nd and reverse. There is a controller under the center console shift panel. Did you spill any liquids in that area?
Was the scan you had done an OBD II (connector under dash). If so no transmission codes there. You need SDS scanner at dealer to pull transmission codes. I would suggest you drive it as little and as slow as possible until you get it scanned.
Generally, Limp Home Mode only provides 2nd and reverse. There is a controller under the center console shift panel. Did you spill any liquids in that area?
Was the scan you had done an OBD II (connector under dash). If so no transmission codes there. You need SDS scanner at dealer to pull transmission codes. I would suggest you drive it as little and as slow as possible until you get it scanned.
Thread Starter
Newbie
Joined: Feb 2010
Posts: 12
Likes: 0
From: Cebu, Philippines
1996 E320 I6 (Japan import) (722.5 tranny)
Hi and Welcome -
Generally, Limp Home Mode only provides 2nd and reverse. There is a controller under the center console shift panel. Did you spill any liquids in that area?
Was the scan you had done an OBD II (connector under dash). If so no transmission codes there. You need SDS scanner at dealer to pull transmission codes. I would suggest you drive it as little and as slow as possible until you get it scanned.
Generally, Limp Home Mode only provides 2nd and reverse. There is a controller under the center console shift panel. Did you spill any liquids in that area?
Was the scan you had done an OBD II (connector under dash). If so no transmission codes there. You need SDS scanner at dealer to pull transmission codes. I would suggest you drive it as little and as slow as possible until you get it scanned.
I also found out that my tranny isn't electronic hence it doesn't have a limp mode. the scan was done in the connection in the engine bay and again, no codes what-so-ever. Nobody has SDS scanners where i'm from so i can only do scans with the OBDII.
As for spilling anything on the controller, i really wouldn't know. I just got the car and according to the previous owner nothing was ever spilled down there. he doesn't allow food or drinks in the car like me.
May i ask what that controller does?
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MBWorld Fanatic!
Joined: Oct 2007
Posts: 1,564
Likes: 19
From: SoCal
98 Brilliant Silver E320 Wagon
If you don't have an electronic transmission then perhaps you don't have the controller I am speaking of. With the 722.6xx there is a controller which translates input from the gear shift lever to the transmission. Owners who have spilled liquids have complained of erratic shift behavior similar to what you describe.
I'm sorry I can't be of more help.
I'm sorry I can't be of more help.
Thread Starter
Newbie
Joined: Feb 2010
Posts: 12
Likes: 0
From: Cebu, Philippines
1996 E320 I6 (Japan import) (722.5 tranny)
If you don't have an electronic transmission then perhaps you don't have the controller I am speaking of. With the 722.6xx there is a controller which translates input from the gear shift lever to the transmission. Owners who have spilled liquids have complained of erratic shift behavior similar to what you describe.
I'm sorry I can't be of more help.
I'm sorry I can't be of more help.
well, my shifting is in no way erratic. it's dead on spot always shifting at 4,000 rpm when i try to push the car.
It's very smooth while shifting, i'm just complaining that it doesn't go up to say like 6,000 RPM when I floor it. It does downshift but only up to 4,000 rpm and then shifts in the next gear.
May i should have a look at the W124 or W140 forums. I think they also have the same transmission as i do... the 722.5 tranny.
Thanks for your reply
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MBWorld Fanatic!
Joined: Oct 2007
Posts: 1,564
Likes: 19
From: SoCal
98 Brilliant Silver E320 Wagon
I agree try posting in the R129 and W140 forums as some models in the US had that transmission. Out of curiosity, I googled "Mercedes 722.5 transmission" and got at least one hit describing it as an electronic transmission.
As far as the gear/rpms, the 722.6 transmission will not allow you to select a combination (downshift) that results in over-revving.
As far as the gear/rpms, the 722.6 transmission will not allow you to select a combination (downshift) that results in over-revving.
Last edited by RichardM98; Mar 10, 2010 at 10:16 PM.
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MBWorld Fanatic!
Joined: Oct 2007
Posts: 1,564
Likes: 19
From: SoCal
98 Brilliant Silver E320 Wagon
You might read this to see if it helps -
http://www.pdfqueen.com/html/aHR0cDo...VfdHJhbnMucGRm
Also, when you have a chance you might add your location to your profile.
http://www.pdfqueen.com/html/aHR0cDo...VfdHJhbnMucGRm
Also, when you have a chance you might add your location to your profile.
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Thread Starter
Newbie
Joined: Feb 2010
Posts: 12
Likes: 0
From: Cebu, Philippines
1996 E320 I6 (Japan import) (722.5 tranny)
You might read this to see if it helps -
http://www.pdfqueen.com/html/aHR0cDo...VfdHJhbnMucGRm
Also, when you have a chance you might add your location to your profile.
http://www.pdfqueen.com/html/aHR0cDo...VfdHJhbnMucGRm
Also, when you have a chance you might add your location to your profile.
i read about this part and it struck some interest with me:
Self-diagnosis and fault memory
The control unit is able to detect certain
electrical faults and to store them permanently
as a fault. Stored faults are not lost when the
ignition is switched off or the battery terminal
is disconnected.
Stored faults can be output with pulse counter
at the diagnosis test connector (X11/4) and
then erased at the push of a button.
The test is included in the Diagnosis Manual
Running Gear.
The following signals cannot be detected at
the diagnosis test connector (X11/4)
My question here is, what does that mean? Do you think i may have a problem with the transmission even though it seems to shift and respond well?
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Last edited by cccullen; Mar 11, 2010 at 12:45 AM.
