think i need CV joint boots ,,loud sound as am going into as go into drive an

What is your question?

main part Q is what cost to just replace front CV boot to changes whole ax just need car one more year 1999 Mercedes E 320 4 matic and can get at less 2 more months out it ,,just started 3-4 days ago on driver side,,hear some noses on other side==see no leaks

What makes this problem better or worse?

same

How long has your 1999 Mercedes-Benz E320 had this problem?

3-4 days