"In fairness, if someone is a jerk to you, but sincerely apologises, it is important to be thick-skinned and accept the apology".
Tesla did not immediately respond to requests for comment.
Vaughn's lawsuit seeks certification as a class-action, to bring in current and former African-American Tesla factory workers.
Tesla is also reportedly facing lawsuits alleging discrimination against gay and older employees, but it has denied those claims.
Vaughn says he was sacked in October for 'not having a positive attitude'.
In the suit, former assembly worker Marcus Vaughn, who said he was sacked from the electric vehicle maker for "not having a positive attitude", claims supervisors and co-workers called him the n-word, but his written report to human resources about it drew no investigation.
Vaughn in the lawsuit says he was regularly called the "n-word" by supervisors and colleagues after he started operating at the factory in April.
Former Tesla employee Marcus Vaughn who worked at the company's Fremont, California factory claimed in a lawsuit that black workers were racially profiled at the company.
According to Vaugh, this came after he filed a complaint to human resources and Musk about Tesla employees repeatedly using racial epithets around him and his black co-workers in the plant. He is seeking undefined damages under a California anti-discrimination law.
"Part of not being a huge jerk is considering how someone might feel who is part of [a] historically less represented group", Musk wrote. "Sometimes these things happen unintentionally, in which case you should apologise". Ferro has said that he was sacked after one of his employees noticed a scar on his arm from a decades-old injury, with an HR official saying he was "handicapped" and stating nothing could be done to accommodate him.
Brian Snyder / Reuters Tesla Motors CEO Elon Musk waves as he leaves the stage after speaking at the National Governors Association Summer Meeting in Providence, Rhode Island, July 15, 2017.
Overloaded with such allegations and lawsuits, Tesla is prepping to launch its semi truck on Thursday of this week.