Review on 2-Pack HYB Slim Digital HID Ballast 55W 12V - Universal Fit For H11, H7, H8, H9, H4 & More! by Jeff Hall

UPDATE - 11/13/2019, seller contacted me and wanted to work out a solution, giving them one additional star . the product really was easy plug and play and worked as intended and designed . the problem I think is the incompatibility with my specific car's circuitry . IT ONLY happens (see below), when my car's automatic dusk sensor kicks in to turn the car's headlights on while already driving . it does not happen when my car starts with the headlights on, the ballast works as intended . but kudos for the seller reaching out to try and resolve the incompatibility . it's just my particular car's circuitry . Mercedes 2013 GL450ORIGINAL - was switching out a 35w ballast for this 55w on Morimoto's 50W HID bulbs on a 2013 Mercedes GL450 . my 35w worked/s flawlessly for 1.5 years . was hoping this 55w ballast would make my 50w HID bulbs noticeably brighter, but I can hardly tell the difference . BUT the biggest problem was this ballast was blinking on me left, right, left, right and then finally after a few minutes, only one remained on and the other one off . but this ONLY happens when my car's automatic headlights comes on when approaching dusk . if I were to start the car at night and it bulbs come on and stay on . works fine . I was able to duplicate the problem for 3 days in a row (and I was out of town . freaked me out a bit having only one working light) . so is not stable enough for my 2013 GL450.