Since this thread has been out there a little while and no one has offered an answer, and you might be wanting to put your car together, I will offer what info I have. I was working on the door checks of my C230 and bought a replacement from the dealer (pre lubed) but ended up overhauling the ones I had. What grease to use was a big question. I had about 9 different choices in my garage and actually installed a couple of different ones on the door checks before finding the one that worked the best. I found the difference between one grease and another amounted to: color, viscosity, smell, temp rating. (A grease expert will, no doubt, tell you that there are many more differences, but this is what seemed important to my job at hand). What was on the factory part was about the color and consistency of vaseline, fairly clear and thick. I ended up using some grease that had been purchased for my Stihl weed trimmer. This was special grease in a Stihl tube that I got from the Stihl dealer. I figured "German car, German grease". I since found another grease at my local NAPA that seemed extremely similar called Silglide. It also came in a tube a little wider than a toothpaste tube. If you have ever used silicone based grease before then I don't have to remind you to use gloves or it will take you about a week to wash the stuff off of your hands. Very insidious. Hope this helps.

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra