The two Latin heavyweights go head to head here with JLR the barometer. México averages about 1,125,000 car per annum while Brazil has roughly 3.1 million. Neither country is a large consumer of premium brands so we can expect low penetration by JLR.
México: JLR does poorly here and it's getting worse. I'm not sure what's going on but sales have fallen badly since 2014 and 2017 is dreadful. JLR secured just 0.11% over this period and it's going to get much lower.
Brazil: LR is very successful here compared to other premium marques, so much so that recently a plant was opened here that assembles two models. Just looking at the data that decision doesn't seem to have changed anything with the volumes of LRs sold, but with total car sales down anyway perhaps it has helped. 0.27% of the total really is quite good, and now Jaguar for the first time is doing well.
Summary: In one there's trouble at mill but the other is doing just fine. The contrast is stark.