Remove husks and silk from corn, leaving a thin layer of husk on each ear. Grill on medium-high heat, turning frequently until kernels are charred.
Meanwhile, combine mayonnaise and crema in bowl. Combine cheese and cracker crumbs in separate bowl just before using.
Pull corn husks back. Brush each ear of corn with mayo mixture. Sprinkle with cilantro, cheese mixture and chili-lime seasoning. Serve each ear of corn with 2 lime wedges.