A few questions re my 1998 C230, 134K miles::

On the 202 should I expect the front tires to wear more or the rear? It seems like the rear has worn more which is not what I expected. How often should tires be rotated?

What are flex plates?

When I go over a speed bump I get a little "squeak". Could this be the lower ball joints? They seem tight. Sway bar bushings? Anyone have specific experience with this problem?

Since one coil drives 2 plugs in opposite polarities does one plug per coil wear more than the other. I think on the old 2 cylinder Citroen that had one coil driving 2 plugs in this manner they used to recommend "rotating" the plugs to even the wear.

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra