Has anyone experienced a hesitation after a gear shift where the car seems to be in too low RPM?

Also, I've been getting a random high rev when slowing down to a lower gear, and a sudden jerking motion when slowing down to a stop. These are random, so I can't be sure if it's the nature of the car or if there is a technical problem.

Thanks!

 

I'd have the dealer scann it. Iv'e had "adaptation" issues with my C240 since I got it. All they end up doing is telling me it's okay and they reset it so it can relearn my driving style, again..But at least a record of it is in place. Mine likes to shift twice each gear change (random, and intermintent) also slams into 1st gear when slowing to a stop. Fortunately no flaring though, that's really not good.

 

you mention reving when it down shifts, and a lug after and upshift...Im sure this is wrong, but I've seen GM trans loose one gear, so when it down shifts say into 2nd, it revs. then it might continue into 1st. Going up from 1st, skip 2nd because it's not there, and lugs in 3rd. Not likely, but I've seen that in less sofisticated trans than ours. Also possible to get stuck momentarily between gears. Gears are engaged by a valve body that works kinda like the valves in a trumpet. Depending on the position of the valves (moved by electric solenoids) determines the "note" or gear the trans plays..

 

interesting, i notice a slight tug when i accelerate from first to second gear but its usually when i let go of the gas and depress it again when it shifts (kind of how you let go of the gas to shift a manual transmission) other than that i notice sometimes if i switch to reverse fast or from reverse to drive fast the car will jerk forward before driving are these things normal?

 

Personally, im not sure about the forward engagement you mentioned, if throttle is added before it gets in gear somthing like that happens you know, but the tug you mention might be exactly what i'm talking about when I mentioned a double shift. I can hold the throttle in one spot, making sure not to let up, or add, and as the car accelerates, it will shift,hesitate half a second,shift again. Somtimes it will do it pretty hard, other times its subtle.It will do this 1st,2nd,3rd 1st being the worst.Then it will quit for a period of time. (I think it likes my wife better, she doesnt complain about it.)

 

Just to let you know, I took the car into the dealer and test drove 3 other CLK 500s that day with the head mechanic that didn't seem to have my problem. The head mechanic looked at my car and there is a small problem with the transmission. It seems that a very small percentage of CLKs experience this - they're not sure exactly how many since the problem is so subtle that many people might not recognize it.

Will post the actual problem/resolution once they actually repair it.

 

please post the solution because i am experiencing the same problem

 

so its normal that when im shifting from 1st to 2nd there is a tug (sometimes i let off of the accelerater before it shifts then press it again)

 

I took the car into the dealer and they replaced the electronic transmission chip/control module that seemed to be defective. The problem isn't totally fixed as the hesitation is still there every once in while, but there definitely is a 75-80% improvement and if the car had driven this way initially, I probably wouldn't have noticed it. I've had it back for almost a week and it's driving pretty nicely!

Goodfella, take your car into the dealer and have them check the chip. I spoke with several dealers and they all suggested that this was the only remedy that they knew of for this problem.

 

I'm not sure what you mean by "tug". In my case, there was a definite slowdown and hestitation, and sometimes even a jerking motion. Again, it was very subtle, but still consistent problem.

 

Your car needs a new tranny..... There is coolant that leaked into the transmission and is causing this hesitation or grinding... Myself, Starr, and a few other people have gotten there transmission replaced......

 

Ohh yeah Jlee81 and Frisco had the same issues....

https://mbworld.org/forums/clk-class-w209/108315-my-car-has-coolant-contamination-problem.html

 

i think i have the problem as well...13k miles on it i dont know how long it has been occuring i just noticed it a few thousand miles ago thought its normal...
its grinding (i can feel it) from 2 to 1st gear none other does that qualify? what do i tell them at the service department? is it an official recall? or i should just say the transmission grinds every time i shift...maybe its bec im in S mode...ill try C mode on the way home (first gear is possible when in manual mode)

 

What causes this to happen; can it be prevented?

 

same problem at only 800 miles. the dealer blamed it on the chip. it's pretty good now, but i still have a very slight lag when i shift from 3rd to 4th (in "manual mode")

 

Coolant leakage in the tranny. You cannot prevent this from happening. YOu must go to the dealership and have a new tranny put in. So far there has been 7 people on this board with the same issue.

 

You should have the dealership check the tranny for coolant leakage...... Its not good to be grinding gears.....

 

If the radiator or one of it's related components is infecting the trans. with coolant then MB should know what can be done as a prevention for cars not yet affected....

Pleae anyone who has their car in for this, find out what we can have checked to prevent this from happening.

Thanks

 

does this affect the C320 as well?

 

Is this effecting both 5 and 7 speed trans? as they are totally different units??? Perhaps since the cooilng systems have not changed from 5-7, then one of the coolant lines etc that is used to cool the trans maybe causing the problem...

 

Ali,

I haven't heard of anything in the C320 with this issue........

 

RJC,

When my tranny got contaminated, they replaced it with a new one. I don't know if there is something that WE can do, but MB can definately prevent it from happening.....

 

I'd like to know exactly what can be done by MB to prevent this.