Correct rear shocks for 300E ?

[BnObob]

I had new shocks put on a 1989 300E. Bilstein 24-18450 or B36-1388 or W124 320 12 13 part number. Didn't know until I looked under the car that this was put on. They are 'form' and 'fit' same as the ones that came off, BUT: function?
When I got to a computer and checked the Bilstein application data, it said "use until supply exhausted" and for varoius 1989 models such as 190E.

Question: Is the function of this Bilstein shock adequate for a 300E car?
If so, I am OK with the substitute.
If not, should I go scream & holler at the shop and supplier?

Thanks for any advice!