The production line in Puebla, Mexico.The two unfinished 181 are for the European market (hence the small rearlights).
Don't know where I found this picture... it was laying in the catacombs of my pc. It seems to be an emergency command vehicle. Notice the roofrack with speakers/sirens and lights. I have never seen another like that, so it must be a customjob. The picture is b/w but it would be safe to consider the color to be blue with black fenders (the colors of the THW).
Below a model in scale 1:43 from Minichamps: