I have a 88 560 SEL and there was plenty of smoking .....
You need to basically get the valve cover gaskets changed and make sure that you covers themselves are straight and true.
As for as removal - I have not done it myself but, should be quite straight forward ... am not sure what your question is exactly.
I will say, remember where all the vacum lines go - that is KEY!!
This is an awesome car when you get it all right ..... takes a while ... am not there yet ....