Mercedes clk200

[Tony911 79]

Hi all, got a clk200 2008 automatic any advice on why when changing up from 1st to 2nd there is a jerk? Have noticed when putting in sport mode it does not happen only in comfort mode. Would a oil and filter change resolve or is it better to go back to the block? 

[Pip 12]

I had the same and a transmission fluid change cured it. 

[Tony911 79]

20 minutes ago, Pip said:

I had the same and a transmission fluid change cured it. 

Was it jerking in all gears 

[Linctrader 16]

Fluid change might sort it but had issues with 7 speed merc boxes something to do with contamination from water leaking from a corroded radiator onto gearbox electric gubbins (im not mechanical so please excuse my ignorance, last car had it was an 06 S350) and it ended up in Eastern Europe getting a proper fix but at a much cheaper rate than we get here in the UK.

I also had this on an 05 E240 and it just needed the gearbox flushed and new fluid and filter and ran great after.

This is the cheapest option so before you write off the car and throw it back in the block, try it first.

[Dave2302 387]

First thing I'd do is reset the Trans Adaptives and drive it for a day or 2 ................

If (as most cars that have stood around during trade in to re-sale process), it has had a flat battery and jump start the Adaptives can end up spiked and don't re learn

Curiously it always seems to be the 1-2 shift that hits hardest !!

HTH

[Tony911 79]

1 hour ago, Dave2302 said:

First thing I'd do is reset the Trans Adaptives and drive it for a day or 2 ................

If (as most cars that have stood around during trade in to re-sale process), it has had a flat battery and jump start the Adaptives can end up spiked and don't re learn

Curiously it always seems to be the 1-2 shift that hits hardest !!

HTH

Is that when you put ignition on and accelerator down for 15 seconds?

[Dave2302 387]

Hi,

Nope, needs going on SDS or a decent Diag Machine like Snap On may do it, 

HTH,

[Tony911 79]

4 minutes ago, Dave2302 said:

Hi,

Nope, needs going on SDS or a decent Diag Machine like Snap On may do it, 

HTH,

Go in to gearbox specialist half 3 today. No point in doing guess work best just to leave to specialist. Do it once do it right. Thanks Dave always appreciate your input

[Dave2302 387]

Yup, if you've got a good auto man, he's the one to sort it, could be a lot of things, but I've had some 722.9's that respond well to Adaptive Reset  

[Rory RSC 596]

I have never once had an auto gearbox fixed with an oil change to date. Not even one.

[SC Derby 259]

10 minutes ago, Rory RSC said:

I have never once had an auto gearbox fixed with an oil change to date. Not even one.

We had it work ONCE...Honda Jazz....but that is recognised issue, judder between 1st and 2nd.

[Lazz 16]

+1

[Dave2302 387]

3 hours ago, Rory RSC said:

I have never once had an auto gearbox fixed with an oil change to date. Not even one.

Exactly, it will give a short term fix if the filter is blocking with debris, but where did that all come from ..............

Answer worn parts inside trans !!

I have always advised folk not to waste their money on Oil and Filter unless there is no issue, and they just want the Trans serviced at 80k mile intervals

Trying to fix shudders, thumps etc is a waste of time if the filter is chokka with bits 

[Tony911 79]

Reset trans adaptive as no faults found gearbox oil looks fresh and advised nothing to do with that anyway gonna drive it couple of days and keep you updated. 

[Dave2302 387]

You should have noticed a difference straight away ????

After a few hundred miles it should become really sweet, although having said that the 722.9 is never as sweet as the old 5 Speed 722.6, I'd describe the 7 speed as "Clinical" in it's shifts.

Bump it should not tho