I just had the motor on my power antenna die about a month ago on my '94 C280. After pricing the part out at the dealer and on various internet suppliers, I just decided that I didn't need a power antenna that badly. The best price I got was from the dealer at $270 (Canadian) for the part, with labour ranging from $99 at the dealer to $50 at a local car stereo place. I went with a fixed antenna, installed, with tax, for $68. Works the same, and looks fine. If you need your car to look 100% OE, then you wont like it. If you don't mind a subtle difference, and don't need the power antenna function, then save your money.

Jonathan