Good afternoon to all,
A friend just purchased a "certified preowned" S 550" (lucky him!) with 13,000 mi. on the car. the front rotors (looking thru the wheels) seem to have an unusually uneven wear on the wear surface and a very pronunced outer ridge. Can you tell me if this is to be expected at 13,000 mi. or is it excessive? Thanks in advance for any words of wisdom!