R-16 is a resistor, and only remove it if you're using high-octance fuel and want a little more poke. Otherwise, don't touch.. it won't affect fuel consumption.

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190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg