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#1
04-19-2010, 01:21 AM
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C43 Tranny "Jerk"
Hey guys, yet another small glitch on my C43. Gee...eitheir im just not used to AMG's or this car doesnt like me much.
Start the car in the morning, let it warm up for about 2 mins and back out of the driveway in reverse....upon putting it into D gear, when the tranny engages forward it a big slam type of jerk/nudge upon engagement. It almost feels like someone has just "gently" rear-ended you when it does this type of gear engagment into D. It Does not repeat this after even if I try to put it in R or P and then into D immediately again. It seems to just be this initial time when going into D the first time of the day especially after reversing. Is this a software issue? Its not a flex disc issue as they are new and that would be a constant "clunking" in any gear, all the time. P.S. records show tranny was replace in 2007 approx 20k ago. I have also had the fluid changed by my indy a month ago just so I know when it was done for my own benefit. Thanks again!
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99 C43 98 S420 99 C230K 01 C240 
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#2
04-19-2010, 07:07 AM
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On the older cars that can be caused by the bowden cable being too tight and so the trans thinks it should be fully engaged right away.....but I have no idea if it works that way on a newer one.....
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#3
04-19-2010, 08:04 AM
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Do you know what tranny is in there? 722.(?) From what I remember the early cars and trannys weren't that stout....but a new one 20K ago should still be good...
 Did you change the fluid to something' better' than stock? Like a synthetic? Redline ATF or the like?
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#4
04-19-2010, 08:19 AM
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Using any fluid other that either MB fluid can cause that problem.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#5
04-19-2010, 09:49 AM
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The tranny is a 722.6 5-speed from the SL600 that was adapted to this engine.
Should I know have an MB dealer re-change this fluid out or go back to my Indy and find out?
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99 C43 98 S420 99 C230K 01 C240
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#6
04-19-2010, 10:43 AM
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Make sure that he used MB special fluid> if he did then have the trans adaptation erased & re-adapt the trans.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#8
04-19-2010, 03:34 PM
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Quote:
I will respectfully fully dis-agree with your statement 'Doc'  BTDT with several high HP MBs like my 92' 500E and former 97' SL600 Sport and 99' E55. Plus 3 C43s that came thru the shop in the past. If he has the stock fluid in there then its def worth a try. In fact, the 500E has had Redline in it for 10 years...and shifts perfectly still at 155K. Every manufacturer wants you to use what they brand themselves...and while it makes sense from a corporate standpoint, it doesn't take into account that there are products that exceed that are not OE.
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#10
04-28-2010, 11:31 AM
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Jim, using Redline ATF in a 1992 500E is like using regular Dexron fluid! They don't require special fluid.
On 1996 & later cars with 722.6 trans..regular Dexron fluid doesn't have the additive package that is required for those transmissions. Have seen 10+ 722.6's ruined by not using either 3353 OR 4134 (DSH or Fuchs) ATF.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#11
04-28-2010, 09:19 PM
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Just a quick note. I have Valvoline Max Life in my 722.6 - and it's been in there for 10 000 kms + with no issue.
The literature says it meets the Mercedes standard required for 722.6. I've also heard of several others with good results.
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#12
04-28-2010, 10:36 PM
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You need to get someone with SDS and scan your car - I've seen a code in the ESM (electronic selector module) cause the tranny's to bang going into gear. Had one on a CLK230 do this, and after clearing all the codes on the car after fixing a check engine light the trans went into gear smoothly.
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#13
04-28-2010, 11:06 PM
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I have exactly the same issue with my 1993 190E 2.6, have been unable to find the problem so far. The bowden cable theory is interesting, I was thinking vacuum perhaps but who knows. Might even be a torn mount under the car or suspension issue. Least likely I think would be a worn out differential. Until something lets go I suppose I may never know. I already looked at it myself and had 2 independents try to assess it to no avail.
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'02 BMW 325i '85 300D 450k '93 190E 2.6 170k(killed by tree) '08 Ducati Hypermotard 1100S 6k '06 Ducati S2R800 14k(sold)
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