Welcome to the site! Use the search button. There is a ton of listings under idle problems etc.
Of course my favorite is the super tonic remedy: Add two bottles of Techron and drive it. It could be your injectors are just plain dirty. Start with this and see how it goes.
I just did this on a newly acquired 190E 2.3 that ran very poorly. Check this out:
190e STalls when put in gear