X2

Your picture is of the lower control arm ball joint, MB Part number 1163330927.

Right upper control arm, MB Part number 1233304707.
Left upper control arm MB, Part number 123304607.

MB suspension parts are pricey.

Before ordering any parts (avoid URO, BTW), it may be worthwhile to have the front suspension inspected by a trustworthy mechanic or alignment shop that has had experience with W123s.

This way you have a complete idea of what is needed to bring your front suspension up to a safe condition for the minimum outlay.

You don't want to replace a part, go in for the alignment afterwards and find out the alignment can't be done because of other worn parts that must be replaced.

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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022