Hi guys I've been on these forums a lot since I've owned my car (almost 3 years) and FINALLY became a member I owe a big thanks to a lot of you these forums have been a big help to me and helped me diagnose a lot on the clk!


Problem: I've been having a vibration while driving highway speeds in the steering wheel and slightly in the seat more of a pulse. It starts at about 80km and gets worse as I reach about 110km at 80km it's very hard to notice but is still there and it goes away as I reach and go over 120km. Now the weird thing is that being from Canada it has been really cold here the past couple of weeks (-20celcius) the vibration has hardly been there I would only feel it sometimes and still barely and now it has gone to +2 and I feel it again I knownthis sounds like a tire/wheel issue but I've been through 5 sets (not exadurating) and had the EXACT vibration every time.


Here is a list of repairs I've made trying to fix this issue
-drag link
-dampener
-5 sets of wheels
-front struts
-new driveshaft
-02 sensor
-front wheel bearings
I could be forgetting something


What I suspect
-Since I've had the car I've had a slight moan when I turn when I am stopped. Would a steering pump cause this problem?

-flex discs + carrier bearing. I found some cracks in both of them while I was under the car last week

-engine mounts/tranny mount I reved while braking one mount seemed a bit excessive but hard to tell

-rear swaybar links feel loose

-and last I also have a slight miss at idle but no codes and idle doesn't really fluctuate but I feel it and when I accel between 1500-2300 rpm sometimes I get a vibration under the car


Everything is in the process of getting fixed but I'd like to know what's most likely causing this problem as I'd like to tackle that ASAP after the flex discs I don't want those going on me. Any suggestions are well apriciated and thank you so much in advance!

 

did you replaced FRONT WHEEL BEARING ???

 

Yeah I did last summer they weren't even loose sorry forgot to mention that

 

check your torque on the front wheels.... you know- that weird screw
https://mbworld.org/forums/clk-class...ening-diy.html

 

Thank you I will try adjusting again I have played around with the adjustment 2 times since I had changed them but maybe I damaged them by putting them too tight or something however I did bring them to a mechanic because I had never changed this type of bearing before so I wanted to be 100% and he said it was all done correctly.

 

:

 

Being that thorough with your fixes, you should now concentrate on isolating the issue further.

If you place the car on a complete lift (4 wheels off the ground) and press the peddle, does the vibration occur? How about if you coasted down a hill in neutral? Does it vibrate when the car is sitting still, shifter in neutral, and press the pedal, get the rpm's say, to 3000 or so?

I didn't see any mention of a 4-wheel alignment, but I might've missed that. I did see 5 sets of wheels, but that's not an alignment-all sets could be totally misaligned.

That information would tell whether its in the transmission shaft, steering system, wheels, engine related, etc. Try those experiments and see where the vibration come up (or if not)

 

Snow has finally melted and its warmed up a bit I was able to jack the rear up and rev it up off the ground. So put it in drive and got a vibration around 3-4000 rpm and it continues throughout the decel. I went under the car as my friend got it back up to 4000 rpm in drive and felt the diff and I feel it a bit but nothing extreme it's pretty crazy in the car however it starts in the rear and makes its way to the front in the steering exactly what I feel on highway also when I look down the shaft nothing seems out of balance or anything. Im getting my car looked at by a transmission and drive line specialist on Wednesday because I had a recent issue where my cars traction control light is flashing when I get up to 80km on the highway and is shifting weird sometimes but drives pretty normal when I have the traction off and I noticed a small leak from the top of the diff at the back. Anyway that's a whole other problem my poor baby