Its not a coil relay, it is an ignition relay, look at the diagram / text on the cover of your fuse box, it is in the back portion of the fuse box. It is a black rectangular box.

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Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red