I broke the four speed manual tranny of my last Mercedes. A 1984 123 Series 200. You can see a pic of it and a brief description of the event at my cars page...
I'm in the minority in disliking the Mercedes Manual tranny. I had two auto's before that and preferred both. The manual was way to unrefined for a Mercedes in my opinion. Also the auto's I had never gave a spot of trouble in the time I had them. Though I will say I've not yet owned a diesel auto with it's attendant harsh shifting and vacume related problems.
81 240D stick. 316000 miles at purchase. 326000 now
2000 GMC Sonoma
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles. Deceased Jan 08
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S