It's either the 16 valve thing or the 5 speed that's less common.
In '95 I drove a '92 190 w/Eibach coils, 16" alloys, and 5 speed. It handled really nice. Not the lowest center of gravity in the world but way better than stock.
A month later I drove a '91 300E which was stock except for better lower profile tires. Ended up buying that one. Just felt better and sooooo well put together.
The 300's have arguably thee most rigid frame of any car I know. Handled fantastically all the way up to 135mph+. I f it waslegal this car could have gone 125 all day long.
Ended up putting over 300K miles on that thing before donating it. Drove it hard. Often.
Like a rock.