Poor Headlight Emission - Mercedes GLA Forums
 
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post #1 of 2 (permalink) Old 02-06-2020, 05:06 AM Thread Starter
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Join Date: Feb 2017
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Poor Headlight Emission

I have a 2017 220d with standard headlights (no LED/ Xenon). I do a lot of lane driving when travelling to my office, and in the winter months, the light dispersion from the headlights is pretty useless. I upgraded the bulbs to new ones that are supposed to be 150% brighter, but they actually seem even worse. When on the lanes in the dark, the headlight dispersion gives me a about 10 yards in front of the car, and about the width of the road. Very poor in comparison to my other car which gives about 20 yards forward and hits way past the verge on both sides of the road. With High beams on, the GLA lights up the road like daylight. I wondered if the wrong bulbs had been changed, i.e. the new brighter bulbs put in the high beam lights. Yesterday, I stopped in a lane with the main beam on, and looking from the front, they do seem very bright, so I'm wondering why they don't seem to be very bright from a driving perspective? Anyone else suffer from this, or have any ideas to improve the light dispersion? Thanks.
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post #2 of 2 (permalink) Old 02-07-2020, 02:49 AM Thread Starter
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Answer my own question, seems I am a complete dummy. The light adjustment switch was turned all the way down. I tried adjusting it last night, but it didn't seem to make any difference to the light projection at first, they didn't seem to move at all, but left it turned up. Went out later, and felt it was a marginal change in normal town driving, came home and pointed the car at the garage, from about 20 yards, and could see light hitting the door, still not as bright as I would like but better. I then turned the switch back to the lowest position, and hey presto, the lights visibly dimmed to negligible projection, turned back to the highest, and light casting on the garage door again.

I did know about the switch, adjusted it when I bought the car 3 years ago. I don't know who turned the switch right down, or when, but mad at myself for forgetting the switch existed and not trying it
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