Coil spring, front for 520/6 fits only for HD-suspension and for 518+518i fits only for HD-suspension and for air conditioning, from 08/1979 up, you need 2 for 1 car
Coil spring, front for 528i fits only for HD-suspension and for 525 fits only for HD-suspension and air conditioning, from 08/1979 up, you need 2 for 1 car