Transmission service done, but ........

What comes to mind is that at the factory, the TC is is installed to the "flex plate" before the trans input shaft is slid into the installed TC. This new W204 was selling well for a new model, and I can imagine a MB factory supervisor, in one of the countries, that ran short on the TC with drain and, unofficially took the power to install an identical TC but w/o drain plug, off the shelves.

Glyn, mabe you or someone you recommend, could take the vins from the two guys that have no drain plug, and see if there is anything in common.
Also, is it possible to get a part # off the installed TC, looking in the port? Would that be helpful in any way?
Kevin
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A 210 (W model designation) 250 04 02
to prior to 722.9 Plus A 221 250 16 02
They are interchangeable but all have minor tweaks.
The 722.6 is the 5 speed & had the drain removed from it's TC in 1999 & put back for recent production + new spares have drain.
I unfortunately have no access to the live MB VIN system. I spoke to my service manager originally who is a Benz employee & he said to me that he had never seen a W204 in SA without a TC drain.
I don't know where the P/N is on the TC housing.
> The SA told each of us separatly (after work was done) that the TC may or may not have a drain plug. But in this case, no drain plug. But he, being an ex-tech, told me he would not be surprised if a tech never checked for a TC drain plug.
> Long time parts guy, who supplies the tech's with parts, checked TC's for the W204 and ALL had drain plugs with separate # for the plug. His experience was that that shop NEVER changed the TC oil. He also noted that no tech ever asked him for a new TC drain plug, or sealing washer.
My conclusion is that this dealer's service dept, has decided long ago not to drain the TC, which about equals the trans in oil capacity. From other posts, sounds like other dealers have the same, poor practice.
My suggestion for those that are due for a trans oil change, would be to check the 2 WIS proceedures with illustrations, trans drain and TC drain, bring copies to the MB shop, and then witness the search for the drain plug, per step 6.
Links from Glyn:
W204-722.9-automatic_transmission_-_oil_and_filter_change.pdf
W204-drain-transmission's-torque-converter
The only tools I bought specifically for this job were an Assenmacher refilling tool that was $150 (adapter and pump) and a $30 non-contact temp gauge from Harbor Freight. Fluid cost ~$50 and filter, gasket, pan bolts, TC bolt, and drain plug washer were also ~$50. You could probably do without the refilling tool. It's way overpriced for what it it is, but I didn't want to mess around with trying to cobble something together. Even buying the tools though, I still saved over $120 vs. the cheapest quote I got to have it done. I could probably sell the refilling tool and recoup some of that money, but I will keep it to use again.
I took me about 4 hours start to finish, but I wasn't rushing and I took a 45 minute dinner break in the middle. I think it could be done in ~2 hours pretty easily.
My car was a 2006 C230 (W203) with 66K miles and this was the first trans fluid change. I got ~3.5 quarts out of the pan and ~4 quarts out of the TC. I put about 8.5 in to start and about a quart came out before I put the plug back in and buttoned it up. So, ~7.5 quarts out and ~7.5 quarts back in for me.
Sorry for the minor thread drift.
The Best of Mercedes & AMG
The TC drain plug is tiny. If you buy it, you will see just how small it is. I had my 12 yo lay under the car while I turned the crank pulley by hand very slowly and he spotted it pretty easily.
The only tools I bought specifically for this job were an Assenmacher refilling tool that was $150 (adapter and pump) and a $30 non-contact temp gauge from Harbor Freight. Fluid cost ~$50 and filter, gasket, pan bolts, TC bolt, and drain plug washer were also ~$50. You could probably do without the refilling tool. It's way overpriced for what it it is, but I didn't want to mess around with trying to cobble something together. Even buying the tools though, I still saved over $120 vs. the cheapest quote I got to have it done. I could probably sell the refilling tool and recoup some of that money, but I will keep it to use again.
I took me about 4 hours start to finish, but I wasn't rushing and I took a 45 minute dinner break in the middle. I think it could be done in ~2 hours pretty easily.
My car was a 2006 C230 (W203) with 66K miles and this was the first trans fluid change. I got ~3.5 quarts out of the pan and ~4 quarts out of the TC. I put about 8.5 in to start and about a quart came out before I put the plug back in and buttoned it up. So, ~7.5 quarts out and ~7.5 quarts back in for me.
Sorry for the minor thread drift.
mine is around 43k so i will have to change it soon! ..
I got a called to today from North America today wanted to hear my complains. They said that they will verify my VIN# with "EPC" to see which transmission does it has before they can tell me if the transmission services were done right. Is there a way you can verify my car for me with my VIN#? Here's the VIN# WDBWK73F89F205393. Thanks.
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Here is a rebuilt 722.9 converter. Sorry ~ could not find a pic of a new one. Some converters have small radial bumps just above the seam ~ some don't ~ see plug.


I will do my best to take some 722.9 pics at the dealer. My car only has 15K on it so won't be under that for a while.
Last edited by Glyn M Ruck; Aug 18, 2012 at 06:01 PM.
I'm curious if I should go ask to see it draining. I think I might. I have a pic which I'll upload later on.
Thanks to all for the help. I really appreciate it.
I'm curious if I should go ask to see it draining. I think I might. I have a pic which I'll upload later on.
Thanks to all for the help. I really appreciate it.

I'm curious if I should go ask to see it draining. I think I might. I have a pic which I'll upload later on.
Thanks to all for the help. I really appreciate it.
Last edited by tasho3; Aug 22, 2012 at 12:21 PM.
Another thing; he said service B is $550 but they have a special for $485, does this sound right? I remember when I took in our C63 couple years ago for service B they charged me the same price?


