dak503
Active member
hi, i have a 2013 passat tdi. the first thing i did when i got my rosstech cable was to up my headlight voltage to 13 volts. i also installed orsam 65w bulbs. now i am installing hids. and i was told to return my voltage to stock. i dont recall if original voltage was 12.6 v or 12.8 v. TIA for any help you can give.