If you have a piece of pipe the right diameter you can cut it with an angle grinder to make a type of socket. Then just heat & quench it to make it hard as, weld a handle on it & you have your own.

The rear wheel bearing ones on a w123 are a total PITA.
I gave up. Put a grease nipple into the hub & shut one up that way !! ~ true shade tree stuff !!

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving