Enoch never experienced death, so did Elijah. Life and death is the power of God. He has dominion over every minute aspects and events. As mortals, we are awed considering many to be miracles.
Yes, Christ died but He is not Dead. Resurrection was not an uncommon phenomenon back then, before and after. I have listened to many interpretations of what the Quran has to to say about Christ and Mary. And resurrection was not uncommon to the writer of the Quran. For the amount of written comments about Jesus in the Quran, the Quran itself establishes the reality of His divinity.
Mark, the first gospel writer wrote of Christ as His teacher. And his accounts stopped at the scene of an empty tomb. A clear statement that Christ is alive.