I am replacing the front pads and rotors in my '92 400E (80k) this weekend. Are the rotors easy to remove/replace or do you have to mess with the front wheel bearings to remove the rotors? How do I know whether the front wheel bearings should be replaced/repacked/resealed? Further, is there anything I should be aware of when replacing the front rotors. Thanks in advance.

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'92 400E (80K)
formerly
'80 300SD (249K)