Estás Loco Carlos?

Charlie Sheen and Brooke Mueller have officially left the country ... together ... and TMZ is reporting the private jet carrying the twosome touched down in Mexico.

The former couple hopped on the jet late Friday afternoon ... they looked like they were heading on their honeymoon all over again.

Charlie tells TMZ ... he decided to take Brooke on the trip as a reward because she's been, "busting her ass with the boys, and [she's] more sober and healthy than I've ever seen her."

Charlie has made it his personal mission to help get Brooke the treatment she needs to finally conquer her addictions.

LAMediaWatch.com