Larry, What about the H1 units?
Sorry to sound like a newbie.. but am I right to assume that the 116/107's sealed beam config is like the W123's? As in one of them is for lo/hi-beam and the other is a fog light? (for each side)
It seems that they sell a separate H1 High beam unit (5.75"). How would he go about replacing the fog light unit with an H1 high beam unit?
I'd just go and get the CIBIE E-Code 5.75" H4 first and replace the main sealed beams and see the improvement before getting the H1 units.
I use Philips' Vision Plus H4 55/60W and they are pretty bright!
BTW, I checked out the new Mercedes G500's and inside their 7" headlights I saw Philips' premium H4 bulbs..