Question here... In my 1998 C230 lately the key has become particular about which way I put it in. If I put the buttons to the left it would start, but with the buttons to the right it would not start. Not it takes about 50 tries to get it to unlock and turn over, but once it turns over (cranks) it starts right up. Could this possibly be the "tumbler" and what is the tumbler? Is that the part you put the key into with the transmitter ring on it? How much does that cost?

Thanks

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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