Originally Posted by LarryBible

Ganaraskas suggestion is valid for most cars, but NOT for a 123 Mercedes. These cars have grease fittings for the door hinge pins. For my money this is the best door hinge ever put on a car and ALL cars should have grease fittings there.

The fitting is a flush fitting that requires a needle on your grease gun. Many years ago when I first started driving these cars, I bought one of those very small pistol grip grease guns and a needle attachment. I put the needle on the grease gun and left it on permanently. I have only used it for the door hinges and for the same type grease fittings that are on the special u-joints in my old Ford 4 wheel drive Farm truck.

You can get one of these small grease guns and the needle at most good size parts houses or a farm store.

Good luck,