It's a 1994 E320 Wagon 124.092.

I had a bad vibration on the front rotors when braking so purchased new OE rotors(marked ATE on the stamping) and OE pads. The old rotors had some good mileage on them and were pretty badly glazed so I decided to replace with new. After changing everything out the vibration went away...at least when driving surface street speeds. It wasn't until about a week later on the highway that I noticed that there was still a vibration, at much faster pulsation, when braking. I have to be driving at least 55+ to really feel it. It's not as bad, but it's definitely there.

I'm wondering if the vibration is actually coming from the rears (vented on my W124)? or the rears were contributing to some of the vibration prior but I never replaced those so that's where I'm still feeling it from. If this is the case, I would be surprised. I've never had warped rear rotors before in any car or truck I have owned.

Is it possible that the rotors I bought from the dealer were bad? I've been told that quality rotors don't need to be "turned" as long as the braking system is working properly with no abnormalities.

Any thoughts?