The idle seems too fast, as if compensating for something.
The 190E was a pile of problems when we got it. I bled the inject lines a the fuel distributor and it helped a lot. Additionally, I did the double-dose of Techron on less than a full tank of fuel and drove it hard.
The engine ran very well after that.
Keep us posted,
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)