The Lions were drawn in group B alongside World champions Germany, Copa América winners Chile, and 2015 AFC Asian Cup champions Australia.
Kerem Demirbay's 48th minute strike and a second half double from Timo Werner put Cameroon to the sword.
Arsenal centre-back Shkodran Mustafi is also a good bet to return to the defence, whether Low elects for a back three or a back four, and Barcelona's Marc-Andre ter Stegen will start after goalkeeping coach Andreas Kopke confirmed Germany's keeper rotation policy for their post-season fixtures was now at an end.
"They have a good team as we all saw".
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The Germans will have to display greater urgency against Mexico than they did in the first half against Cameroon.
Ryan repelled efforts from Vargas and Sanchez early in the second half as Chile threatened an equalising goal, which eventually came after 67 minutes when Rodriguez poked the ball home from close range from Vargas' downward header after Australia had failed to clear their lines.
The blunder by Ter Stegen for Cameroon's goal should concern Loew. It was the most recent by a Germany goalkeeper worldwide Mug warm-up competition.
Cameroon is left to play for classification before returning to Yaounde to begin their preparation for the trip to Uyo to play the Super Eagles in the double headed Russian Federation 2018 World Cup qualifier in August. Cameroon have crashed out of the Confederations Cup while Germany have topped Group B with seven points.
Julian Draxler hopes Timo Werner can prove himself to be the future of the Germany attack after the RB Leipzig striker got up and running at global level with a brace in the 3-1 win over Cameroon in Sochi.
The World Cup rehearsal tournament had encouraging moments for both teams even if they did not win a game.