818,036 W126 sedans were produced in the lifetime of this chassis making it the longest running sedan series Mercedes Benz ever built.
For comparison:
Chassis
Number Made
Years
W126
818,105
12/79 - 9/90
W220
485,000
7/98 - 7/05
W108/9
461,400
8/65 - 11/72
W116
444,401
72 - 80
W140
406,532
4/91 - 9/98
W111/112
344,751
8/59 - 1/68
R107
300,175 built
71-89
W180/105/128
111,035
06/54 - 08/59
All US spec 560’s were rated for 238hp. The European came with either 278 or the 300hp. The 300 would often have a “HV” stamped on the block which signifies high compression.