True, but I'm not putting the old one back on, nor a new one from Mercedes Benz.
I can assure you the aftermarket parts are not near the original quality. Mercedes forum members operate under the misconception, that if a company( ex. Febi, Lemforder, etc) is the manufacturer for parts that Mercedes uses when building the cars, then the parts they sell aftermarket are identicle. Grapes, drill the proper size hole, depending on what grease fitting size you choose, that will allow the first thread to start, and self tap them in. A six point socket and 1/4" ratchet make this happen easily. Adding fittings to parts already installed will complicate the process some, but still do-able.