Blower Motor for Heat A/C on 2001 Mercedes-Benz ML320

Fan for Heat/AC starting making louder than normal noise at higher fan speed setting particularly on high - is there anything I can do as I don't drive it but every one to two weeks and it has 103,000 miles but plan on long trip this summer. Mercedes said may be a bearing going bad and wants over $500 to replace entire motor.

Asked by for the 2001 Mercedes-Benz ML320
Pull the blower...check for debries, lube and reinstall.
How difficult is it to pull blower motor?