Excerpt:

"OM617.952
The revised OM617.952 also displaced 3.0 L but was now 2998 cc with a 90.9 mm bore and 92.4 mm stroke. Power output was 123 hp (91 kW) at first but rose to 125 hp (92 kW) in 1983."

Applications:

123 PS (121 hp/91 kW)
1981-1983 300D Turbo
1981-1983 300CD Turbo
1981-1983 300TD Turbo
125 PS (123 hp/92 kW)
1983-1985 300D Turbo
1983-1985 300CD Turbo

121hp should be 90.23kW
123hp should be 91.72kw - rounded to 92 I'll agree with...
125hp should be 93.21kW

Wikipedia is always a great source of informational errors -

Look at

http://en.wikipedia.org/wiki/Mercedes-Benz_W123

When did 123 body offer a 5 speed?
123's with ABS?
US cars - "Automatic transmission cars have column switch" - is this the gearshift or ignition switch? Many European car journals used to refer to column gearshift lever as 'Column switch'...

bnc