I need help. Do I need a new head gasket?

[Mercedes Guy]

I drive a 1992 190E 2.3 with just over 96,000 miles on it. A few weeks ago I notice a few drops of oil on the garage floor. Last night I took a really good look at the engine to determine where the oil is coming from and it seems to be coming out the right side (passenger side) of the engine just under the exhaust manifold. It's not leaking that much, only a few drops a week. Some of it has dripped into the plastic cover under the engine and the rest appears to be dripping off the transmission onto the ground. I've had this car for three years and it has never leaked a drop of oil, so I don't know why it started all of a sudden. It doesn't use up that much oil, either. I change the oil every 3000 miles and I check the dipstick once a week. The oil level on the dipstick doesn't move at all over the course of 3000 miles. Does this sound like the head gasket? I have no idea why it started leaking all of a sudden. I hope someone can help me with this.