2013 GLK 350 headlight bulb replacement. - Page 2 - PeachParts Mercedes-Benz Forum

Diseasel300 · #16 02-20-2020, 02:51 PM

Quote:

Originally Posted by ILUVMILS

So you think that maybe two years of trade school qualifies one to be an engineer?

You're new to how engineering works aren't you? The engineer is rarely the one who designs the final product. He gets the credit, he had the project in his name, he did the basic design work, but it was a tech/lab-rat who did the trial fitment and the final revisions. The engineer signed off on it, usually with extreme prejudice against anyone who would say ANYTHING constructive or disrespectful towards their precious design.

Just for a second, let's pretend you're a general tech at a dealership with that "two year degree". Day in and day out you lube/oil cars, you change light bulbs, you replace various parts as the service manager says. Then along comes this car with its stupidly designed headlight. Wouldn't you think that's a poor design? Maybe not a "flaw" but certainly not a "good" design.

Quote:

Originally Posted by ILUVMILS

Condescendingly? You were obviously speed reading when you scanned my previous post, just sayin'

Yes, condescendingly. Just like your posting here. I didn't speed read or skip over anything. Just because you say something with a nice voice and bat your eyelashes doesn't take away the meaning or intent.

engatwork · #17 02-20-2020, 07:09 PM

As an engineer working in paper mills for 30+ years who is occasionally responsible for equipment and machinery layout I always try to make sure anything I install is maintainable. I learnt that by working on Mercedes

.

pawoSD · #18 02-27-2020, 11:15 PM

Best solution is to remove those H7 halogens and put in some quality LED replacements, huuge difference in lighting and they'll last much longer!

ILUVMILS · #19 02-28-2020, 12:05 PM

Quote:

Originally Posted by Diseasel300

Just for a second, let's pretend you're a general tech at a dealership with that "two year degree". Day in and day out you lube/oil cars, you change light bulbs, you replace various parts as the service manager says. Then along comes this car with its stupidly designed headlight. Wouldn't you think that's a poor design? Maybe not a "flaw" but certainly not a "good" design..

Funny you should bring this up. I was that "general tech" with a two year degree (worked my way up to Master Technician, now Shop Foreman) and I came across many designs that I thought were idiotic. After spending thirty-five years in the MB Service business I've seen more than anyone I've seen on this Forum.

The big difference between myself and the armchair engineers here is that I've actually gotten to meet, and speak with many MB engineers over the years, unlike the opinionated "experts" here.

Diseasel300 · #20 02-28-2020, 01:11 PM

Quote:

Originally Posted by ILUVMILS

Funny you should bring this up. I was that "general tech" with a two year degree (worked my way up to Master Technician, now Shop Foreman) and I came across many designs that I thought were idiotic. After spending thirty-five years in the MB Service business I've seen more than anyone I've seen on this Forum.

The big difference between myself and the armchair engineers here is that I've actually gotten to meet, and speak with many MB engineers over the years, unlike the opinionated "experts" here.

That's cute. I grew up as a tagalong kid working oilfield jobs with my dad. I moved into working in electronics production, went to school and got my education, been to multiple training facilities around the world, and for the last 18 years have been the head engineer designing motor drives and electric switchboard controls. If I took the same attitude as MB (or you), I wouldn't be in business. When you get feedback from the technicians installing and servicing your equipment YOU LISTEN.

The only reason MB can get away with crap like that is because of their reputation and snobs like you defending poor design "because it was meant to be that way" instead of "yeah, it's a lame design and could have been done better, but that's how they did it".

engatwork · #21 02-28-2020, 07:50 PM

In reading ILUVMILS post he does not come accross as a snob to me. Actually I have gotten a lot of good information from his post.

davidmash · #22 03-02-2020, 12:47 AM

Quote:

Originally Posted by pawoSD

Best solution is to remove those H7 halogens and put in some quality LED replacements, huuge difference in lighting and they'll last much longer!

From what I have read this is not really a good idea. The reflectors are designed for the way an incandescent disperses light. LED's do it in a very different way and the light pattern will be off and result in glare and blinding for on coming cars. There is also a heat issue.

I stuck with conventional lights. Not willing to screw up the cars electrical system.

raymond~ · #23 03-02-2020, 01:22 AM

definitely not a good suggestion absent any testing with a SPECIFIC LED brand and design
and pairing it with the reflector bowl of that model car. notwithstanding that such an LED
modification is technically illegal in nearly all of the US on public roads, there is no standard
on LED design so the focal point of the LED emitter will almost always produce unwanted
glare.

if you take two magnifying glass models and try to start a fire, the odds are that each
will be held at different distances from the target media. why? focal point

in order to produce a quality light beam, spread and controlled focus (minimum glare)
the light must be calibrated.

lsmalley · #24 03-03-2020, 01:28 AM

Quote:

Originally Posted by raymond~

definitely not a good suggestion absent any testing with a SPECIFIC LED brand and design
and pairing it with the reflector bowl of that model car. notwithstanding that such an LED
modification is technically illegal in nearly all of the US on public roads, there is no standard
on LED design so the focal point of the LED emitter will almost always produce unwanted
glare.

if you take two magnifying glass models and try to start a fire, the odds are that each
will be held at different distances from the target media. why? focal point

in order to produce a quality light beam, spread and controlled focus (minimum glare)
the light must be calibrated.

I agree. I was one of those that put HID lights in my stock 201 and was embarrassed every time someone flashed me. I ended up correcting the problem, albeit it took several years to test and correct it, but much happier with the output and I haven't been flashed since. I'm always amazed that there are cars post-2010 that still use halogen bulbs. I wonder if the new California law will do away with them for cars being made after 2020.

Guardians · #25 03-04-2020, 09:44 AM

Quote:

Originally Posted by davidmash

From what I have read this is not really a good idea. The reflectors are designed for the way an incandescent disperses light. LED's do it in a very different way and the light pattern will be off and result in glare and blinding for on coming cars.

This is correct. Subpar results are always to be had when sticking a LED in a hole where a halogen bulb belongs.

pawoSD · #26 03-04-2020, 08:25 PM

Quote:

Originally Posted by davidmash

From what I have read this is not really a good idea. The reflectors are designed for the way an incandescent disperses light. LED's do it in a very different way and the light pattern will be off and result in glare and blinding for on coming cars. There is also a heat issue.

I stuck with conventional lights. Not willing to screw up the cars electrical system.

I am using these along with the CAN bus adapters they sell: https://www.boslla.com/

Light pattern is great because the LED module is specifically designed to place the two LEDs exactly where the filament in a halogen would be located (and is on a copper substrate of equal thickness) No one flashes me, when I installed them I went through aiming them and ended up dropping the beams about "5 full turns" of the adjustment in the downward direction. Not because the LED's cause high light pattern, but because the stock pattern when multplied by 4x the lumens ends up with a bit too much high level light unless you drop them a bit.

Works great. I guess I'll enjoy my LED's and you can all drive around with your prehistoric lighting.

Zero errors on the computer either using the can bus adapters (and there wasn't without them either but the lights would flicker slightly). Flicker is gone with the adapters. I've been running them for almost 5 months problem free.

pawoSD · #27 03-04-2020, 08:27 PM

Quote:

Originally Posted by Guardians

This is correct. Subpar results are always to be had when sticking a LED in a hole where a halogen bulb belongs.

Unless that LED unit happens to place the LED chip exactly where the halogen filament used to be, then its just the same light pattern with 4x the light output and better color.

Guardians · #28 03-05-2020, 02:12 PM

Quote:

Originally Posted by pawoSD

Unless that LED unit happens to place the LED chip exactly where the halogen filament used to be, then its just the same light pattern with 4x the light output and better color.

Unfortunately, there is no LED bulb that actually places the chips exactly where the filament used to be.

Most people are stuck thinking in 2D:

Unfortunately, most things in real life are 3D:

pawoSD · #29 03-05-2020, 10:55 PM

It may be a 2D light source, but my Seat of the Eyes meter says I can see about twice as far down the road with better clarity than I could with those fancy 3D halogens.

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