Hi Glyn,
Torque converter is OK and "gibt keine Fehler"
GRzz
William

Hi Glyn, no codes whatsoever. Or Stardiagnose tells me: Wandler (TC) Keine Fehler...
Grzz
William

Well "are no errors" seems common when there are in fact problems. If the problem is not the torque converter clutches misbehaving then you likely require to replace the clutch packs in the gearbox.

hey guys! i had the same problem with the 1st to 2nd. i DIY my tranny to make sure its fully flushed. Also i reset the Throttle. Jerking went away. perfectly fine now. i did all this at 70k miles.

Hi Glyn,
You might be right but to be sure I send you a picture of what is replaced allready in the electronic-hydraulic unit of the gearbox... The left number 30 is replaced for shifting from 1st to 2nd gear. Did't help anyway. Is your clutch pack located somewhere else in the gearbox? Could a teflon ring be leaking in there? Pictures of the 203 gearbox can be found here

My biggest concern right now is that I have never found a solution on any of the Dutch, German or American Forums. I just do not understand. I think MB knows more about this problem but a recall would be too expensive for them.
I would say: Just tell me what the problem is and I will let them fix it so I can drive relaxed...

Grzz,
William

If it's not the valve body & it's not the TC clutches - Then it is the multi wet plate clutch unit on the first to second gear change in the gearbox on the main shaft. If a fluid change has not worked then the friction materials must be damaged.

Could be true Glyn and I will take my car to Germany again after Eastern. Perhaps the best solution is a refurbished gear. Still stands the problem that this is not normal for a car with only 30.000 km...

Grzz
William

I agree - Will Benz not consider it under warrantee - did you report it under warrantee?

No Glyn,
I bought this car with 19.000 Km from and old lady in Germany. She drove 2.400 km a year and changed oil every 5.000 km. All servicebooks are here including stamps. Car was bought in Stuttgart. Head department of MB in Germany. Donn´t think I still have warranty. I treat my car with silk gloves and this problem just appeared at 30.000 Km.

Grzz
William

Glyn, do you know what spec tranny oil the 722.6 tranny uses?
I seem to be seeing that it's 226.1 is this correct?
If that's the case, there seems to be a number of compatible tranny oils that
are much less expensive than the stuff from the MB dealer,
including Mobil 1 and Amsoil.

No - The latest recommended oil by Benz for 722.6 & 722.9 trannys for "smooth switching" in Benz language is page 236.1 & 236.12 at 60,000Km/39,000 mile drain - see pdf attached. You can use the older fluid but I would not unless you change every 25,000 miles - not worth it.

"The 722.9 uses a newly-developed transmission fluid, referred to as ATF 3353. It promises a higher frictional consistency, thermal stability, and temperature rating. ATF 3353 can also be used on previous model 722.3/.4/.5/.6 transmissions. This special ATF is available from Shell & Fuchs Europe oil suppliers in 1 liter bottles under Mercedes Benz part number A001 989 45 03 10 or 12" In the US you can buy it from your dealer.

Benz have given up the filled for life BS that they had in some markets because of transmission wear & poor shift quality. Here we have always had the 60,000Km drain.

Hi,
I went to an automatic gearbox transmissionspecialist two days ago. He immediately told me that the problem is the one way clutch inside the gearbox that is broken. Two disks mounted together, appr. 20 cm in diameter that rolls or turns only in one way. Those two disks are hold togehther by bearrings that only go one way. In his career he has had many taxidrivers in his shop who had the same problem. Here in The Hague many taxi's are E series who have the same 5 speed gearbox as I do. (722.6) He told me I can drive with it without any problems as long as I drive it in Wintergear or Comfort gear. The gearbox starts then with second gear. Repair however will be Eur. 1250,- The owner also advised me to knock on MB´s door for explanation why a part like this would break so soon for a mileage of only 32.000 Km... Hope this will help you guys...

Gr,
William

I'm sorry to hear this - That primary clutch pack usually fails due to too many high torque changes. With taxi drivers you can understand this but you seem careful with your car. Driving in C is not really a long term option on the 4 cylinder models.

Mine shifts kinda hard in first gear really.. Coming from second to first is a pain. When i have my car in winter mode the car seems to work perfect. As everyone knows the car starts in second gear. I will do a transmission flush soon and post if this helps.. Computer updates with the car? Does the dealership charge for such a thing? I wanted to get a few things done. Locking / unlocking Beep Gallons left before tank is empty. Im sure there are a few others that i would want.

The 7G 722.9 guys on the 204 forum are having a field day with the downshift issue - this is the most recent of many threads

https://mbworld.org/forums/c-class-w...ing-sound.html

Yeah, I know Glyn,
But at least I know what the problem is now... I have been searching forum after forum without a solution, you know. I hope other people with the same problems can do something with my information. Thanks anyway for your support and comments!

Greetings from Holland
William...

Getting my Tranny Fluid Flushed tomorrow! Hope this makes it a little better. Any advices before I go in? I just hit 707XX miles today.

Also, how many quarts should I expect to have put into the tranny, when I'm getting my car back? It is a 2003 C230K, with 722.6.

So today I had another transmission issue. Other than the hard Jerk when comming to a stop I tried to accelerate and I had my food Halfway on the "Air Pedal" and nothing. It felt as if I wasn't even hitting the gas.

Now here is my question I recently put rims on the car. If I take it to the dealer will they BS me and say it's the rims that caused this issue? Will they say anything like that?

Thanks

"AirPedal" inside joke looool

I can't imagine how a dealer is going to blame your rims for a lack of response from the engine when you hit the accelerator in a C350.

Then again, lack of response from the engine when you floor it is a normal trait for the M272 2.5L I hear.

With my problem I dont really think it's a hardware issue. There are times the car is perfect and there are times it runs pretty bad. Altough I do get that jerk when I come to a stop quite often.

When I took it in the first time, I was getting lag I would accelerate and there was a little lag then it jerked the car. They reflashed it and it was fine. Now I am getting not much of a lag but sometimes when I press the gas it sort of lags a bit (while moving). But that doesn't always happen. I doubt it was from the transmission itself but some control unit.

And the jerk is definitely a funky transmission shift and not a broken mount of some sort?

jk - I know you troll the 204 forums so you are well aware of the 7G traits. The TCU on the 7G seems to take some time to decide which gear to select. I sometimes wonder whether the multiple gear downchange capability causes this if you catch it at a critical "decision" point. I find with the 7G that smooth driving is rewarded with consistent behavior. Converter clutch release is also part of the problem if you are braking hard.

Regarding wheels - the dealer can't complain - The only time they can is if the rolling circumference of your front wheel set varies by over 2-3% when compared with the rear. This messes with the ESP & as a result - the TCU.

Don't take any notice of LILBENZ with his LIL engine 350 V6 rules!

I agree M272 3.5L rules. I said the 2.5L..

Thanks Glyn

The jerk is 80% of the time. And recently I drive very well. I'll be honest with you guys I think I messed up the tranny the first time.

I had just got the car so I thought maybe I should have some fun with it.
I took a turn around maybe 40-50 but like an idiot I pressed on the gas (It was a two lane street and I swerved to the oncomming so I tucked my wheel all the way and pressed the gas again and fishtaled other direction).





I'm not an artist but here is what happened.

Could have this messed up some control unit that it needed to be reflashed?

Learn from my mistake and don't do something stupid lol. I came literally inches away from crashing. Mercedes Handling





The reason for my whole story is NOW I started to drive very carefully. So I don't abuse the car like I did when I first got it. So i'm still wondering why I get the jerk. But I remember the Guy at the dealer said usually the problem is the Torque Converter. If I recall correctly he said "it's a common problem"

Yes - likely damaged torque converter clutches. They replace the whole thing to effect repair