Ok thanks.

I see alphas at the end of the part numbers with the same part number.

For example;

124-589-182-100-MBZ
124-589-182-100-M22

A W124 sunroof lifting arm I can get in MBZ or M22, a $20 difference and quite a few parts I want are like this including the sunroof rubber seal. I want to be careful about ordering the right part