NeilBlanchard: both are slightly convex, Mercedes one just has some airflow through it and the other one has all openings blocked off.
Arragonis: yes it is Skoda Octavia combi TDI 1Z
I know that Mercedes wheel cover comes from W124/W201 models. I didn't mean to link it to the CLA, I just have them laying around in my garage and was wondering which one would be better to use.
I already adjusted the nut behind the wheel and done many other mods on my car. 70+ MPG(US) is my PB and 60MPG tank is not very hard to achieve
As a proper eco driver I try not to use brakes at all, so no cooling is needed.
Because I know there are many extremely knowledgeable people on this forum I just wanted to know if there is some merit to that statement or it would be better to stick with completely flat cover not allowing any airflow through.
deejaaa: living in a post-communist police state moon discs/pizza pans are not an option nere. I need something that looks OEM, so no wild aeromods for me