Damn.. guys.. The mechanical said that sounds are from the parking brake then I changed parking brake parts and also I paid it $421.. But!!! yesterday morning, I heard weired sounds compare to previous it obviously......... so I went to BMW of San Francisco but today they said that they checked all parts include the LSD but they never found any problem... How may I fix it..????? Who has same problem with me?? or who has been fixed it? Please Let me know.. It's really really stressful..
p.s I'm Korean so.. if any Korean knows about it, please let me know.. somebody use Korean for explain that is really helpful to me.. Thank you guys..!!! firstname.lastname@example.org