Yikes! Is she okay?
How about another 190E?
Naw, I am sure you want variety too!
The 300E I have is very nice and dependable... but if you want true reliability.. go diesel man!
But I imagine your wife may not like the loud sounds of a diesel..
Tell you what, my mom drives a 1999 E320, very nice and quiet....
had a few quirks at the beginning, but is very dependable now (knock on wood!)
The different steering setup of the W210 chasis gives almost no steering feel of the road, however, it provides a VERY luxurious ride!
Try to get her to test drive (I am sure you already know that, but I am stupid, sorry!
)