This case is worth mentioning: the Japanese car producer Mazda brought a case before the WIPO arbitration center to obtain the transfer of mazda.com.mx.
This case was not too hard to win: Exact reproduction of the trademark, no answer from the defendant... The domain name was transferred to Mazda.
Since this company also sells a car which name is Mazda MX-5 (and used to sell MX-3), it could probably also have argued that the use of .mx in the domain name was another source of confusion.
[WIPO Domain Name Decision DMX2005-0003 (case in Spanish)]