W123 front brake disc replacement

[MBeige]

I believe it's time for me to replace the front rotors but seeing that there are so many brands available online from Balo, ATE and even Brembo, which brand is best?

I'm leaning towards Brembo or ATE, but would like your opinion first. Is this a direct replacement - remove old disc and replace with new? Or are there more things I need to know about?

Reason I know I need new rotors, is I feel a vibration on the pedal when I brake. Replacing pads didn't help, and it's been like that for a long time already. Replaced guide rod mount as well since it was shot, but that didn't help.

As always, your input is appreciated.

[johnathan1]

I replaced the rotors on my 300CD a while back...it wasn't all that easy from what I remember...you have to disassemble the wheel bearings, clean and repack with grease. (or replace if they are bad). I used Balo rotors, and they worked just fine.

[Chad300tdt]

When I replaced my rotors, I used this thread to help me:
How To Replace Front Rotor W123

Including the time it took to replace the bearings and pack with grease, I was able to R&R the rotors in about 35-40 minutes per side. I also upgraded to calipers and rotors from a 1985 300SD (1st gen. w126) so I could have vented front rotors.

If your wheel bearings are OK, you'll still need to get new bearing seals. Also, you may want to pick up a race/seal driver set, it will make it very easy to tap the new seal in squarely. A wheel bearing grease packer will make repacking your bearings a cleaner and easier job. They only cost about $10 or you could massage the grease in by hand for free but spend a few bucks for a roll of shop towels for cleanup.

I used ATE for everything and it's holding up very well.

Don't forget to check your rubber brake hoses while you're under there. They have a "born on date" stamped on them (mine were over 10 years old and shot). They swell and deteriorate from the inside, so they could be pinching off the flow of fluid and look fine on the outside.

Good luck.