X2 as Army said.

I have the same compressor. It works in the 126 ok, because the hole is larger.
On the w123 it is the inner piece of sheet metal that causes the problem.

Start fileing it down, and use the big end of the shaft for a fit until it goes in with some wiggle room. then POR the edge to seal it good.
I used a rasp bit that fit into my 3/8 drill, and then finished up with a 1/2 round file to smooth it down.

It`s really a lot of fun at PNP with just a file .

Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works