JWT, your coil (silver can, green sticker) should be matched to a 0.9 ohm ballast Resistor. It should say that on the green sticker. You can get the 0.9 ohm resistor from Bosch or BERU makes one too that's less expensive. This is where I recently purchased mine frrom:
Bosch:
https://www.rmeuropean.com/Products/0001580845-MFG14-V3244.aspx
BERU:
https://www.rmeuropean.com/Products/0001580845-MFG47-V3244.aspx
0,9 is the way that Europeans write 0.9 or 9/10ths.
Good luck,
John