'97 E420 Transmission Question
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Newbie
Joined: Dec 2022
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From: Wheaton, IL
E420
'97 E420 Transmission Question
I own a beautiful 1997 Mercedes E420 which I acquired a few years ago. The local MB dealer refuses to give me any maintenance records for my car, which I bought 3rd party. The transmission on my car recently has gone into electrical limphome-mode and needs servicing. Probably the first servicing this trans has ever had...I want to DIY this instead of spending large sums of money at a 3rd party mechanic, let alone going to the dealer. I have done a lot of homework on parts and the actual work that needs to be done. I am in need for parts and found a used '02 E320 with a 722.664 trans in a bone yard and I want to know if any internal parts are cross compatible with my 722.664 trans.
Can anyone explain the differences with internal parts between a 1997 Merc E420 722.6 trans and a 2002 Merc E320 722.6 trans? Are any parts cross compatible with each other or do I have to go hyper-specific with exact model and year? Solenoids, Circuit board, 13 PIN Connector + O-ring etc.
Thank you for your time and expertise.
Can anyone explain the differences with internal parts between a 1997 Merc E420 722.6 trans and a 2002 Merc E320 722.6 trans? Are any parts cross compatible with each other or do I have to go hyper-specific with exact model and year? Solenoids, Circuit board, 13 PIN Connector + O-ring etc.
Thank you for your time and expertise.
Member
Joined: Dec 2018
Posts: 117
Likes: 26
From: NC
2011 E350 4Matic Wagon 2002 E430 2004 SL500
While doing your research did you read anything about symptoms of a failed or flakey transmission conductor plate? That may be all you need to replace instead of an entire tranny replacement. I'll let others speak to the compatibility with an 2002.
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Joined: Nov 2022
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From: LE HAVRE NORMANDIE
w208 M113K
I own a beautiful 1997 Mercedes E420 which I acquired a few years ago. The local MB dealer refuses to give me any maintenance records for my car, which I bought 3rd party. The transmission on my car recently has gone into electrical limphome-mode and needs servicing. Probably the first servicing this trans has ever had...I want to DIY this instead of spending large sums of money at a 3rd party mechanic, let alone going to the dealer. I have done a lot of homework on parts and the actual work that needs to be done. I am in need for parts and found a used '02 E320 with a 722.664 trans in a bone yard and I want to know if any internal parts are cross compatible with my 722.664 trans.
Can anyone explain the differences with internal parts between a 1997 Merc E420 722.6 trans and a 2002 Merc E320 722.6 trans? Are any parts cross compatible with each other or do I have to go hyper-specific with exact model and year? Solenoids, Circuit board, 13 PIN Connector + O-ring etc.
Thank you for your time and expertise.
Can anyone explain the differences with internal parts between a 1997 Merc E420 722.6 trans and a 2002 Merc E320 722.6 trans? Are any parts cross compatible with each other or do I have to go hyper-specific with exact model and year? Solenoids, Circuit board, 13 PIN Connector + O-ring etc.
Thank you for your time and expertise.
cordialy A++
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Newbie
Joined: Dec 2022
Posts: 8
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From: Wheaton, IL
E420
Bdevil85
I did find out about the conductor plate and the connector plug which I am replacing. This from what I have been reading are the most common issues with this trans. I also found out this transmission has not ever had a service job done to it in its lifetime. I currently have 220K on the clock and am currently doing a service job. I'm not going to try and figure out bone yard parts from another different Mercedes. Plus I was abler to find the proper number 722.625 and conduct all of the rest of my research and new parts, plus tools. Thank you for your response. Aaron
I did find out about the conductor plate and the connector plug which I am replacing. This from what I have been reading are the most common issues with this trans. I also found out this transmission has not ever had a service job done to it in its lifetime. I currently have 220K on the clock and am currently doing a service job. I'm not going to try and figure out bone yard parts from another different Mercedes. Plus I was abler to find the proper number 722.625 and conduct all of the rest of my research and new parts, plus tools. Thank you for your response. Aaron
Thread Starter
Newbie
Joined: Dec 2022
Posts: 8
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From: Wheaton, IL
E420
Thank you all for your responses. I really appreciate it. I was able to get the info off of the transmission, a 722.625 and conduct better, more concise research into the particular problems. I found oil in the connector plug, so there probably would be the problem. I am currently doing a service of the transmission with replacing the conductor plate, connector plug, filter and oil. This transmission was never serviced in its lifetime, now with 220K on the clock. Thank you Plutoe, especially for your reply. I was a bit new into my research in which why this question came up. I love this car and I want to keep driving it. It's the sentimental value that holds my heart.
Member
Joined: Dec 2018
Posts: 117
Likes: 26
From: NC
2011 E350 4Matic Wagon 2002 E430 2004 SL500
Thank you all for your responses. I really appreciate it. I was able to get the info off of the transmission, a 722.625 and conduct better, more concise research into the particular problems. I found oil in the connector plug, so there probably would be the problem. I am currently doing a service of the transmission with replacing the conductor plate, connector plug, filter and oil. This transmission was never serviced in its lifetime, now with 220K on the clock. Thank you Plutoe, especially for your reply. I was a bit new into my research in which why this question came up. I love this car and I want to keep driving it. It's the sentimental value that holds my heart.
