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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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Discussion Starter #1
Greets.

Yes, I know this post was for a W210, but since it is the "same" Transmission as alot of the W140's on the road,,,, I thought I would "throw it out there" for you folks.

I guess I am surprised that the Conductor Plate (ie. "Electronics Pack", "ETC") is a well know problem on other models with the 722.6, but I don't recall seeing this issue raised on this forum.

Also included is the R/R for the Pressure Regulator Spring for the "2nd Gear" section of the Valve body, another "Achilles Heal" of the 722.6 box. The symptoms are a "rough" shift 1->2 and 2->3. The spring can Snap, or Shorten, giving these symptoms. And (like many other parts MB uses.... ie. my Power steering pump on the W140--- MB doesn't sell a stupid Gasket kit for a small leak... I even tried to contact LZ/Sachs in Germany... also no kit...
"Oh just throw the whole part away"), MB does not even LIST a part# for this spring.. Like the lead tech down here says... "Oh, we just put in a new Valve Body...." Great! Throw out a zillion dollar part for a few$ spring...

I also included the R/R for the "New" Bushing for the Trans. Electronic Connector.


Anyhooo, My particular story was this:

A well know problem to us all.... Failure of the "Electronics Pack/Conductor Plate"....

With 2 other MB with the 722.6 box, I've "always" noticed a "Difference" in the way the E320 shifted.. Even straight out of the Sindelfingen plant... "A different thrust/weight ratio??".. who knows...

Well the Human self-defense mechanism of "Denial" is quite strong.... After having a progressively more "noticeable" shifting between 1->2, and 2->3.... "Well, I'll reset the computer".... It is slightly better for "awhile"... then Yuck. "Well I say (again) to myself.... OhLord *DID* say the new 722.9 fluid causes a harsher shift...""

My bubble of Denial burst the other day... Going to work... at a stop sign, hit the gas... VVRROOMMM... but am NOT MOVING!! Ok, let's try reverse... VVROOOMMM

Oh.... Sh.....ugar!! A $5,000 trany needed!!

After a "reset" I get home, and hook my Baby up to my new "toy" STAR Compact3.

Since I have the diagnostic skill of a Temple Monkey... I use my "Mechanic in a Laptop" to take my hand and guide me down the diagnostic tree to determine my "Speed Sensor #3" is "Intermittently" failing.. So, I'll change it out.

Thus, the post.

Here is a list of needed Parts:

8 quarts of the "new" MB fluid 001-989-68-03-10
Filter 140-277-00-95
Pan Gasket 140-271-00-80
Lock Clip 140-991-00-55
Trans Pan Drain Washer 140-271-00-60
Torque Converter Washer N 007603010100
Conductor Plate/"Electronics Pack" 140-270-11-61
"Updated" Connector Bushing 203-540-02-53
Pressure Regulator Spring (Yes, those Idiots at MB change out the WHOLE Valve body, rather than the stupid $8 spring-- thus, NO MB number) Sonnax 68942-01 You should be able to get it at your local Transmission Supply house.

Like the WIS warns.. "Even a Speck of Foreign Material can Cause **FAILURE** of the Transmission"---- So BE WARNED!! Absolutely METICULOUS Cleanliness must be observed... I LITERALLY wore surgical garb, so no Hair, no NOTHING would inadvertently fall into the valve body... and I did the work on a sterile surgical drape.. Overkill?? Perhaps... but that's just me...

Of course, "usual" safety procedures must be observed. If you don't know what that means... then this job is NOT for you.. Do work at your OWN RISK!!

Cheers,
G
 

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1996 S500 coupe
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780 Posts
great write up, thank you but I believe the spring does have an MB part #.

I have recorded spring p/n 1409935801 from the 210 722.6 forums.

Not sure if dealer sells it based on this p/n though.
 

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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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3,093 Posts
Discussion Starter #8
Hmmmm, that's interesting, as the EPC does not show ANY internal parts withing the Valve Body.

Granted, I don't have access to the Internal MB Paragon system, but on the Online EPC, running the part you list (under "With" *OR* "WITHOUT" Vehicle data) both come back as "No Part Found", as you can see.
 

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Outstanding Contributor W221 Moderator
2010 E350 P1/P2, 2008 S550 Designo, 2002 ML320
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1,828 Posts
Bravo sir! :bowdown: BTW, just snagged a 6291-1 CT! ;) The Stahlwille looks beefy, if not a little too bauhaus for my taste.
 

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1996 Mercedes-Benz S 600 L (W140)
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1,272 Posts
really nice DIY,
 

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Depends on the day!
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13,337 Posts
Beautifully done DIY! Great photos, clearly explained..!

Nice tools btw;-)

Jonathan
 

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Registered
1996 S500 coupe
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780 Posts
Hmmmm, that's interesting, as the EPC does not show ANY internal parts withing the Valve Body.

Granted, I don't have access to the Internal MB Paragon system, but on the Online EPC, running the part you list (under "With" *OR* "WITHOUT" Vehicle data) both come back as "No Part Found", as you can see.

hey

I went to the dealer this morning and based on the part number, they ordered it for me. Should be here in a couple of days .. it was only a couple of bux... your local dealer can get the springs using the p/n.

I replaced the trans. plug today as well.

again, great write up ...
 

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1995 E420, 2003 ML500
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5 Posts
Excellent write-up sir, you've helped many of us.
 

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'00 E320 Sedan-34k miles
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63 Posts
MB newbie-Stupid Question here...Is the 5mm Inhex drive necessary or can I just use a regular hex drive. I have a lot of tools and am pretty handy and I've never heard or seen of these Inhex drives. Does the pin on the drive push in something, or just designed to hold it in place better???

Here is a link to show example of Inhex for clueless people like me. :monkes:
Stahlwille , 03070005 54IC-5 INHEX Hex Socket 1/2 In Drive - 5mm

BTW in the 2 months I've owned this beast I've learned the true meaning of "German Engineering." It means cock-blocking the DIY'er. :p Simple things are over engineered just to make you take it to the dealer. Still bad-ass cars though.
 

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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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3,093 Posts
Discussion Starter #16
MB newbie-Stupid Question here...Is the 5mm Inhex drive necessary or can I just use a regular hex drive. I have a lot of tools and am pretty handy and I've never heard or seen of these Inhex drives. Does the pin on the drive push in something, or just designed to hold it in place better???

Here is a link to show example of Inhex for clueless people like me. :monkes:
Stahlwille , 03070005 54IC-5 INHEX Hex Socket 1/2 In Drive - 5mm

.
Yes, the link you show IS an Inhex... but actually an unusual "variant" of a "Safety Inhex".. (do you see the little extra "tip" on the tool).

A neat and handy variant (from that same page) is the "Ball Tip" Inhex:
Stahlwille , 03280005 54KK INHEX 1/2 In Dr Ball Point Socket - 5mm
This comes in handy for odd angles. It is useful on the Torque Converter Drain Plug.
Stahlwille makes Top Rate Tools, on par with Hazet.
 

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'00 E320 Sedan-34k miles
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63 Posts
Thanks for the reply. I have more questions. I've done tranny filters and flushes before, but none with torque converted that can be drained. I just plan to do the filter and fluid. Once I drain the TQ, does it simply refill from the main pan before I restart the car? Will it be dry till it circulates through or do I need to fill the TQ too?

Also, the car holds a total of about 8 quarts correct? I've done the DIY type of flush where you disconnect the return line at the radiator and refill. I would suppose I'll need about double the fluids??? Is the method do-able on this car? (I know its kinda ghetto, but works well.)

Man I'm sorry for so many simple questions. I'm trying to get the WIS to help. It kills me there are no readily available manuals for these cars. This is my first German car and there is so many variances. Thank You to all those that help everyone so much with your experience and knowledge (and patience w/ newbies like me). This site rocks because of the great people!!! :bowdown::thumbsup:
 

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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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3,093 Posts
Discussion Starter #18
Thanks for the reply. I have more questions. I've done tranny filters and flushes before, but none with torque converted that can be drained. I just plan to do the filter and fluid. Once I drain the TQ, does it simply refill from the main pan before I restart the car? Will it be dry till it circulates through or do I need to fill the TQ too?

Also, the car holds a total of about 8 quarts correct? I've done the DIY type of flush where you disconnect the return line at the radiator and refill. I would suppose I'll need about double the fluids??? Is the method do-able on this car? (I know its kinda ghetto, but works well.)

Man I'm sorry for so many simple questions. I'm trying to get the WIS to help. It kills me there are no readily available manuals for these cars. This is my first German car and there is so many variances. Thank You to all those that help everyone so much with your experience and knowledge (and patience w/ newbies like me). This site rocks because of the great people!!! :bowdown::thumbsup:
Sorry to burst your bubble, but "if" you are speaking of your 2002 CLK... then you will NOT have a Torque Converter Drain. For "Production Cost Savings", they deleted the 20 cent plug as of (circa June 1999?).

You are stuck with "drop the pan, replace filter" scenario, which will net you around 4,5 litres. I know there are fancy "purging" methods, which use a boatload of very expensive transmission oil (@ $13 bucks a quart!), but I think this is overkill.

I think "most" will advise you to just do the 4,5 litres, and ("if" you are anal about it), REPEAT the procedure in 10 or 20.000 miles, to "dilute out" most of the OLD fluid.

My .02

G
 

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'00 E320 Sedan-34k miles
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63 Posts
Ok thanks again for the assistance. I guess I can still say I've never owned a car with a torque converter drain. LOL. So much to learn on these cars. Thank god for this site and it's members!
 
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