DIY 722.6 Electro Plate / Speed (rpm) Sensor / Pressure Regulating Spring

Miffy

Senior Member
Joined
Sep 6, 2008
Messages
7,356
Reaction score
3
Location
Bromley, London
Your Mercedes
CLK 320 CAB Elegance C208
Thanks to G-AMG over on Benzworld for giving me permission to use his DIY guide. I have included his full text as it contains information about replacing just a spring instead of the complete valve body.

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!!

0_zps0931fd09.jpg


1_zps3cc60265.jpg


2_zpsb04f0f94.jpg


3_zps41026e0e.jpg


4_zps9ac6fb26.jpg


5_zps02d779c5.jpg


6_zpsff1c10f0.jpg


7_zpsb1d75dcc.jpg


8_zps6316f09f.jpg


9_zps77d2766b.jpg


10_zps4fd93d25.jpg


11_zps07a084f8.jpg


12_zpse5437b8d.jpg


13_zps6f7f8aaa.jpg


14_zpsaf13b0b7.jpg


15_zps124bc65a.jpg


16_zps819390dc.jpg


17_zps1caa5d80.jpg


18_zps40d00149.jpg


19_zpsaa71e8be.jpg


20_zps64c2cbce.jpg


21_zps63925838.jpg


22_zps19dd555e.jpg


23_zpscdcdad17.jpg


24_zps733a66f4.jpg


25_zpsf89d75b9.jpg


26_zps27546854.jpg


27_zpscdba723f.jpg


28_zps49366f99.jpg


29_zpsbf5849db.jpg


30_zps426bbe50.jpg


31_zps3456d395.jpg


32_zps83852d50.jpg


33_zps4c3b26b0.jpg


34_zpse974cee0.jpg


35_zpsb8b13fbd.jpg


36_zps93a24cc9.jpg


37_zps5cb01794.jpg


38_zps473228de.jpg


39_zps1fa99f95.jpg


40_zps2b719509.jpg


41_zps2b1797da.jpg


42_zps1d63debd.jpg


43_zps140aa27d.jpg


441_zps6ca4d2f2.jpg
 
Last edited:


Comand (Europe) Ltd are the leading specialists in supplying and fitting Comand, Linguatronic, Media interface kits, UHI phone, IPod interfaces and much more.
Top Bottom