Did Jesus reach old age?
Let us look at Noble Verse 5:110 "Then will God say: "O Jesus the son of Mary! Recount My favour to thee and to thy mother. Behold! I strengthened thee with the holy spirit, so that thou didst speak to the people in childhood and in maturity. Behold! I taught thee the Book and Wisdom, the Law and the Gospel and behold! thou makest out of clay, as it were, the figure of a bird, by My leave, and thou breathest into it and it becometh a bird by My leave, and thou healest those born blind, and the lepers, by My leave. And behold! thou bringest forth the dead by My leave. And behold! I did restrain the Children of Israel from (violence to) thee when thou didst show them the clear Signs, and the unbelievers among them said: 'This is nothing but evident magic.'"
Where does it say that Jesus reached an old age? There is a little fraud on your part Mr. Jochen Katz. I highly suggest for you to go and actually read before you criticize any Noble Verse from the Noble Quran. Otherwise, you would be a big fool without even knowing it.
The word "maturity" in Noble Verse 5:110 above does not at all mean becoming old. It means when he passed the teenage period of his age (when he became a grown man).