Price for 1 set 4pcs Works best for compressor kompressor type. Cgi cant, 1 of it faulty. Fir cgi If u wan to change 2 or 3 unit. U can buy this, kompressor voltage is lower for spark. Means can use all 4 for kompressor. I used for my w204 c200 2010, if this fit for other model, u can try.