For those that have the rough 2-1 downshift in "S" mode - Page 7 - Mercedes-Benz Forum
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post #61 of 68 (permalink) Old 10-25-2011, 11:08 PM
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Hi Eric !

Thank you for all these informations !

Do you know if there is the same procedure for EU models ?

Many thanks
P.
It affects all models listed US or Europe as they use the same transmission.


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post #62 of 68 (permalink) Old 06-07-2012, 11:39 AM
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Just replaced mine on 2007 R500 CPO warranty

Had the rough Downshit and sometimes the Upshit jerk as well. Took it to Dealer - said Diagnostics didnt show any codes and couldn't replicate, I went there again to test drive with foreman - showed him the problem in 10 meters - he didn't even test drive it himself - they had to get approval from MBUSA - MB sent a new Valve body and changing it now. Thanks to this forum for the info.

Advice. Go to a dealer who knows this issue - my service adviser was like - i have never heard of this issue and dont know. Dumb asses.
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post #63 of 68 (permalink) Old 06-07-2012, 10:33 PM
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Had the rough Downshit and sometimes the Upshit jerk as well. Took it to Dealer - said Diagnostics didnt show any codes and couldn't replicate, I went there again to test drive with foreman - showed him the problem in 10 meters - he didn't even test drive it himself - they had to get approval from MBUSA - MB sent a new Valve body and changing it now. Thanks to this forum for the info.

Advice. Go to a dealer who knows this issue - my service adviser was like - i have never heard of this issue and dont know. Dumb asses.
In a dealership or a specialist, for the most part Service assistants only know how to book a car in and talk with customers, only a small number truly understand the technical aspects. Many service managers are out of touch with the shop floor so the best way is to ask to speak with the tech who is working on your car.


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post #64 of 68 (permalink) Old 06-18-2012, 01:46 PM
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Hello, I have a 2008 R350 with about 33K miles and I get a slight jerk from 1 to 2. It only seems to happen in the morning though.

I'm the 2nd owner of the car and it's got a well documented service history from Bev Hills MB. In the docs it does state the following tranny repairs;

replaced multi-disk clutch k1, replaced transmission line seals and transmission fluid service.

There's no mention of a valve body being replaced and the previous owner's experience was documented in the service invoice as, 'car seems to jerk but only in the morning, dealer confirmed after test drive'

I still have a warranty on the car, so am wondering if I should bring it in?

2008 R350
2001 BMW 530I Anthracite Metallic - 5 speed
2003 BMW M3 Coupe Alpine White - SMG
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post #65 of 68 (permalink) Old 12-29-2012, 04:38 PM
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Try this before new valve body.....

I have a 2007 R500 that used to exhibit this same issue. I never had it fixed BUT when I had the car batteries replaced (both of them)..the system was somehow reset and this problem went away completely.

I would suggest to anyone on this thread to have the batteries disconnected and reconnected. You will need to recalibrate the windows and such but it's really worth it. Something about the 722.9 transmission "learning" computer being reset.

Anyway just my $.02.
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post #66 of 68 (permalink) Old 12-05-2015, 04:28 PM
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Had car for 2 days now and the transmission problems are all gone. I can't feel any hard shift points in S or C modes.

Here are the part numbers off my invoice... If it helps anybody...

Replaced Valve Body Trans and Recode- Road Test ok

220 270 27 06 CTRR UNIT E
220 271 03 80 Gasket
001 989 68 03 10 Transmission
004 990 75 12 Screw W Coll
004 990 35 12 Screw
007603 012102 Ring General
000 988 01 52 Magnet
221 277 01 95 Oil Filter

I have had this 06 R500 certified car for three months and I think all the problems are finally fixed.

So far... Under MB Warranty

Sunroof rattled..... Whole sunroof and sunshade mechs replaced..

Right front air shock leaking... MB replaced both fronts they said they always
replace them in pairs

Hard shifts 1-2... New valve body installed

I have 3 more years or 60K left on this MB extended warranty. Looking at these invoice prices I don't think I will keep this when the warranty expires. It is however the nicest family transporter on the road and even with the three problems that I had I love the car.....
Mind sharing the invoice price to r&r the valve body for those who no longer have warranty? thx
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post #67 of 68 (permalink) Old 12-05-2015, 05:33 PM
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http://gnnmotors.com/mercedes-benz-7....p3kjP17G.dpbs

It was under warranty. But advisor said it would have been around $2500. Car is long gone by the way I now have a 2012 r350 with no problems so far. Good luck
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post #68 of 68 (permalink) Old 06-29-2017, 10:15 AM
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Mercedes Benz 2008 S550 Transmission issues

Just reading this very informative thread, thanks for all the contributions. I am planning to buy a 2008 S550 with 57000 miles, on the maintenance record I see that the Internal transmission was repaired in 2015, first can anyone explain what is a internal transmission repair and why it was done, was this because of the issues discussed in this thread regarding the Valve Body problems and can I assume that since this repair was performed that I will not encounter transmission issues in the future.
I found this very informative article regarding the transmission issues. Any advise would be appreciated, thanks very much
Mercedes - 722.9 7G-Tronic Valve Body & Conductor Plate - Must Read - MB Medic

Last edited by MB 1991 300SE; 06-29-2017 at 10:17 AM.
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