I had replaced the low beams w/LED in my '15 Passat. I went back to H7 halogens (PIAA...Lows and Orsam Night Breaker...Highs. The LEDs were too bright and cant be properly aimed (too high of a pattern). I adjusted the headlights down to where I wasn't getting flashed "AS" often, but still was.....I then had no useful high beams.
PS: What does the '15 Passat SEL Prem have for lights? I would assume LED or HID...IDK. At this point the only "best" option for really upgraded lighting would be a take-out OEM set from a Passat equipped with LED/HID....again, not sure what they came with.