Originally Posted by Adrian Abshire
We picked up the wife's 2006 SLK280 yesterday and it has a wobble/shimmy/shake only when braking. I would venture to guess this is the rotor that is warped... Should I replace the rotor with vented rotors and what pads to use. I want to get this done today if possible and do the work myself. Will NAPA/AutoZone/Oreilly have the brakes (ceramic?) and rotors I need? NAPA had some slotted rotors but not sure of the quality... $145 but I like to stop as quickly as possible so money is not really a problem...
Your problem could be because of the front wheel bearings and not necessary the disc or brake pad.
Please do a simple test if it is due to the front wheel bearings. (left & right wheels)
Jack your left front wheel up. (wheel hanging in the air)
1) Using both hands, grab the wheel on 1 o'clock & 6 o'clock' position.
Try to shake or rock the wheel.
If there is a slightest movement, then it could be the problem.
2) Then do it again on 9 o'clock & 3 o'clock' position but in this positions, please make sure the steering wheel is locked or get someone to hold it tight.
Also make sure all the steering system are of no movement when you do this test. eg: ball joints, lower arm ball joints, etc.
If it is only just the movement as in (1) then it is mostly your wheel bearing is at fault.
If you have no "grinding sound" when free wheeling, the the wheel bearing is just simply a wee bit loose.
Remove the wheel & then tighten the wheel bearing.
Simple as that? not really if you don't know how.
Open the wheel bearing cap & tighten it according to manufacturer' spec.
Rule of thumb: tighten the wheel bearing hand tight until the wheel cannot spin with your hand.
Then Loosen it by a a quarter or half turn.
check again as in (1)
At the same time apply as much grease as possible to the bearing.
This should solve your problem.
Thank you & have a nice day.
ps: must do this check for both wheels.