thanks for the tips here.
114,000 miles installed bosch platiinum 2's today.

2.5 hours. One plug was broken and 1/3 came off with the spark plug boot.
the old one's all had gaps of 45 thousands.

It went easier when I tried pulling the boots off with an upward motion.

I got 16 city and 20 hiway before the change. I will report in - if there is any change.

I KNOW THIS - i have saved about $3000 in labor the last 3 years doing all the maintenance myself with the help of this forum.

__________________
Steve Danville
what i did myself.
CPS
rear shocks
MAS x 3.
SparkPlugs (twice)
Fuel pump & Filter
Window switch
replaced both failed horns with Honda horns.
Cleaned ERG Tube
Oil changes
Oil consumption Fix
Brake Pads
A/C Recharge
Anti-Freeze change X 2.
Front Shocks. Monroe. $90
Mercedes Warrenty Work:
Harmonic balancer,power steering clamp. Cat converters.Drive Shaft Bearing.s
Replaced Outer Lower Tie Rods and front lower ball joints at 156,000 miles