Using the H7 lightbulbs. The passenger light is cracked but I have the most problems with my drivers side lightbulbs. My highbeams have never worked since I bought the car. The battery is only a year old and still extremely clean. The only "mod" I have done to my XF is side exit straight pipes and 275/30/19 rear tires. The car is bot lowered but have ruined several front tires but the tire will b full tread except for the inside 2 to 4 inches of the tires .I've trued turning the steering wheel lock to lock and back to center several times. To help troubleshoot the issue of the steering my steering seems to b extremely easy to the left but a noticeable difference when steering to the right. Car doesn't pull in any certain direction tho