" ...... need help convincing my wife"
I found that helping spouses understand what it is about Benzes makes all the difference. Safety, longevity, etc are convincing arguements.
Sometimes just pointing out particular cars. Stopping and taking one for a test drive at a dealer can be fun.
I am lucky because my wife grew up with a diesel Benz. Her family still talks about it.
It was a natural transition for our family.
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)