I was cleaning out my trunk, and I cam across the tire lug nut remover tool (whatever it's called) and I thought it might fit for the damper bolts. Well it did, and I got the old one off and the new one on. But when I was driving up onto the ramps, they slid and boom my grill went into the gym thing that's in my garage. I pushed the thing forward about a foot, and it's HEAVY. But my car was fine!! So no worries, a real scare though.
Anyway, I went and drove the car after putting on the new damper, and it drove wonderfully. It is about 80% better. There is still a very slight vibration at about 60, but nothing to worry about. Good buy and VERY easy to change.
And BTW, I asked my mechanic, and he did balance the tires when he put the new ones on a few thousand miles ago.
As for the oil plug bolt, maybe that's why I have such a hard time getting it off?? I have only been able to change it once, every other time, I strip it and have to take it in for them to remove it and put a new one on.
Anyway, thanks a bunch for the help.

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)