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1997 320E
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20 Posts
Discussion Starter #1
Is anyone familiar with Trans Code ID55 & 151? It says Gear comparison incorrect or target gear lever not reach.
Also Engine Code PO730 says Incorrect Gear Ratio Please let me know because there are no dealers here
 

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03 E320 4M Wagon & 97 E320
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3,926 Posts
You are having some (complicated) transmission issues that may have many causes and also drive people dizzy.

Your codes are actually all pointing to the same problem.

The 55 and 151 are actually the same (Mercedes transmission) codes. The 55 is the active code and the 151 = 55 + 96 is a stored code (an old code). An active code plus 96 becomes a stored code.

The P0730 is the generic code.

Some possible causes are (there are many)

Solenoids
Internal transmission (valves, springs, plates, etc.)
TCU (Transmission Control Module)

I am sorry you are in this situation. I have a 1997 E320 and fear that someday it will happen to mine.

You can search for P0730 and there are several threads. Unfortunately, the causes and repairs were not clear.

Good luck.
 

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1997 E320, 1997 S320
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2,946 Posts
gear ratios are calculated from n2 and n3, and i think they are located on the conductor plate. do you know a mechanic or anyone with sds or other reader that can read the speed sensor values?
i was getting a transmission code also in my 97 e320 (p0715, not p0730) every now and then and my gear shifting was irregular. after i changed the conductor plate transmission is behaving normally. also it was my second fluid/filter change. i did the first one 2 and a half years ago (~120k miles) and fluid looked a little dirty, not too bad though. and the second one a few months ago (~160k miles) along with the conductor plate change. fluid didn't look too bad, but transmission behaves fine so far so good. no codes and shifting is perfect. i think the conductor plate cost for me was between $150-200, but i think price went up. good luck.
 

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03 E320 4M Wagon & 97 E320
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You are lucky, tirona. I am happy for you.

There is a very long thread by manna (97 E420) and he started with P0715 and replaced the conductor plate but that did not resolve his problem. He then rebuilt the transmission but still has the same old problem. AT one time, he also had the P0730 (a search for P0730 will bring up that thread.).

Just noticed this for fun.

Although your 97 has 60k more miles than my 97, I have 9 more posts than you here. :D
 

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1997 E320, 1997 S320
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loubapache, is 722.9 fluid better/last longer than the 722.6 fluid? i remember you mentioning a while ago both fluids are compatible.
 

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1997 E320, 1997 S320
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oneroar111, i would give this guys a call and ask them about your situation 7226 .
also have you ever changed the tranny fluid?
what size are your rear wheels/tires? i wouldn't be surprised that an incorrect size would cause the gear ratio problem.
 

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03 E320 4M Wagon & 97 E320
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loubapache, is 722.9 fluid better/last longer than the 722.6 fluid? i remember you mentioning a while ago both fluids are compatible.
I do not know if it lasts longer or better but Mercedes supersedes the 722.6 fluid with the 722.9 fluid. Then last year they superseded both with a new fluid. What I heard is that they kept having shifting issues with the 226.9 transmissions so they kept updating the fluid. :eek:

I think I have posted them somewhere. The newer fluid is thinner than the older one.

However, I just got a PM from a member on this form who has a little vibration at 40 mph on his 4Matic. He used the Valvoline MaxLife fluid and the vibration was gone. This fluid is little thicker. See the viscosity info I gathered below.
 

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thanks loubapache, i did use the 722.9, and i don't know if it's all in my head, but the transmission seems to shift better especially in cold mornings when it's not fully warm yet.
 

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E320/E250 Bluetec Ford F350 6.7l
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When I did fluid change on the car with 230,000 miles I noticed heavy fluid residue at the bottom of the pan. Don't know if the fluid was original, or not but it didn't look too bad otherwise. Regardless new, thiner fluid smoothed out cold shifting
The fluid change requirement is still unresolved IMHO.
I am getting ready to do it on the car with 187,000 miles. From the pulled sample it looks pretty nasty. The transmission shifts perfect.
Have new fluid coming from MB of Anaheim "in the mail" . Wonder which one they send
 

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03 E320 4M Wagon & 97 E320
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Have new fluid coming from MB of Anaheim "in the mail" . Wonder which one they send
I bet you will receive the 236.12 sheet fluid, aka 722.9 fluid , part number 001-989-45-03-10.

The newer (updated) 722.9 fluid (236.14 sheet) is part number 000-989-68-03-10.
 
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