To remove the plastic engine cover to gain access to the top of the engine on the 2000 Mercedes ML 320 all you have to do is simpily pull up (Carefully) on each corner. I would do the front two at the same time and then the back. Be sure to be careful and take your time.
I guess you didnt see our thread about the crank possition sensor. We got the cover off with no problems however we thought that some people might not realize what holds it down, and how to properly remove it without cracking.
Stoma your Yugo does not have anything like this, so please dont even worry about it.
__________________
What is to give light must endure burning -- Viktor Frankl