Wanted to post this information here for anybody who has a 722.6 transmission.
This is related to the 2002 CLK320.

No torque convertor drain plug on the CLK unfortunately. Plan is to disconnect line at transmission cooler near radiator and have it go into an already marked 2Qt bucket.

First I will drain the pan, clean it thoroughly (I expect a horrible pan @ 105k original fluid (i think)), replace filter, refill with fresh new fluid the same amount of fluid I drained. Start the car and let 2QT flow into the bucket. Turn engine off, top up 2QT, and repeat until the fluid comes out as clear red as it gets. I have bought a total of 12QT's of fluid for this.

Do NOT use Valvoline Maxlife, it is not MB approved and if you search, there are plenty of threads on this at other forums. Its "compliant", but not approved by MB. The original fluid is Dex III-based, but a variant of it due to the electrical components inside the transmission and there have been no long-term threads who users have Maxlife have reported back anything more than 40k worth of history using it. The 722.6 has proved itself in taxi's of doing almost a million km's with nothing more than fluid changes every ~50k miles. I wouldn't want to risk it saving $20 on a change since the Shell 134 is only $2 more a quart.
You can purchase Shell 134 MB approved fluid at Ryder Fleet Services for $5.5/qt online. No reason not to use this.




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While under the car, I plan to replace the transmission plug/adapter that is known to leak or force fluid up into the module in the engine bay causing erratic shifting and other issues. Luckily its not damaging since transmission fluid is non-conductive, but it does require you to pull everything out, clean it and drain transmission fluid etc....I decided to be pro-active on this.

DO NOT buy the adapter @ the dealer!!! Go to a local Dodge/Chrysler dealer and they have the EXACT same part that is used in the Crossfire, for half or a third of the MB price. I paid $10 for it. Even comes in the same box!!

Will post on Saturday with more photos of fluid change and results.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
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2003 Gray Mercedes ML350 - 122k