Help! Wobble when braking - Mercedes Benz SLK Forum

Tires, Wheels, Brakes & Suspension Discussion and information regarding tires, wheels, brakes and suspension.

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#1 Old 06-25-2016
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Help! Wobble when braking

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...
http://www.napaonline.com/napa/en/p/...400_0249144975
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#2 Old 06-25-2016
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#3 Old 06-25-2016
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Wow, thanks! So you think I need rotors and pads? Are the parts stores going to carry the sensor (I think that's what it's called)?
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sorry, i am not the expert. others will chime in when they are not enjoying the weekend and their meets in the UK

those pdfs have the part numbers so you can get exactly what you need.
you might head to mb parts either at dealer or online sites


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I found ceramic pads and drilled rotors at Advance Auto Parts - never thought they would have them in stock but they do! NAPA - nothing in stock, Oreilly had rotors but not drilled and no ceramic pads... So off to Horrible Freight to get a jack and stands to change the brakes... Hopefully bleeding these brakes is not difficult... I do have a brake bleeder from my Miata days that I can use hopefully...
Off to YouTube for some tips!
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or our diy section
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Quote:
Originally Posted by Adrian Abshire View Post
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...
http://www.napaonline.com/napa/en/p/...400_0249144975
Hi
Good day.

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.

DIY?

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.
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#8 Old 06-25-2016
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After running the jack stand through the side of the car (don't ask) I decided to take it to a local brake shop...
They are saying the rotors I bought from Advance are not correct because I bought the 'Sport' package and I have the non-Sport package... I know the Sport brake pads don't fit but are the rotors different?
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#9 Old 06-25-2016
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Quote:
Originally Posted by Adrian Abshire View Post
After running the jack stand through the side of the car (don't ask) I decided to take it to a local brake shop...
They are saying the rotors I bought from Advance are not correct because I bought the 'Sport' package and I have the non-Sport package... I know the Sport brake pads don't fit but are the rotors different?
Yes, they are probably larger, fronts 330 mm instead of 300.
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