Opps, I think that you are right - the 126's were ET23.
Looks like the ET37 was actually from the 190D/E and 300E ,CE, TE and the C230.

__________________
Feelstranger
My Wheels
1991 Audi 200 20V Avant
1991 VW Westfalia Syncro/Audi I5
1983 Mercedes 300D turbo
1972 Kawasaki H1 500 Mach III
1970's Limongi/Campy road racing bike
1942 Old Town sailing canoe