The Mexico wholesale distribution market operates on a relationship model that a new entrant cannot shortcut. The top WDs control access to the refaccionaria channel - the retail installer accounts that drive the aftermarket. Getting to them requires either a direct sales presence or a distributor with real shelf space and real relationships in that channel.
Most U.S. companies enter with a distributor they found through a trade show or a referral from their U.S. rep. That distributor may have good intentions and zero reach in the channel that matters. The result is a distribution agreement that locks up the territory for years with a partner who cannot execute.
CIMA has sold to all 39 top WD and retailer accounts in Mexico directly. The difference between a distributor who has real access and one who does not is a distinction that only shows up in primary research - in the room, with the account, finding out what they actually carry and who they actually call.