okay, so I did a little more investigating, and I have a list of symptoms.

1. When I first start the car, i don't really get the clinking sound. Also when I am driving the car, as in accellerating, i don't get the clinking sound either.

2. when i step on the clutch, I do get the clinking sound if I am traveling less 30mph.

If it is the motor mounts, that sounds like it could be it, only because of the fact that the engines seems to vibrate and shake around a lot more when the car is in idle, because it seems more stationary when it is working harder, like when you are in idle, and you have the idle switch turned all the way down, the engine shakes a lot, but when you have the idle switch all the way up, then it does not appear to shake.

If anybody has any suggestions, or can agree that it would be the motor mounts

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1981 240D/297K/4-spd/OM617 (mine)
1982 240D/241K/4-spd (wife's)
1979 240D/291K/4-spd/OM617 (father-in-law's)
1983 300DT/240K/4-spd (brother-in-law's)
1985 300DT/???K/5-spd Intercooler conversion (brother-in-law's)
1985 280TE/160K/5-spd (father-in-law's)
1963 UNIMOG (brother-in-law's)