As far as capacity, I don't have your car, but there is a big difference between the total capacity, and the amount you can drain out and replace. At least in my car there is. I don't know a way to drain everything out. I opened the block drain etc. So I doubt you will really need 12l. IMHO.

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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