threekeys

Hello, I have an E420 and I am looking at replacing the headlights. I pulled one of the headlight housings out but there is some sort of vacuum line attached to it that leads to a round black thing inside the housing which is attached to nothing. Can someone please tell me what this is and what it does. Thanks

raymond g-

it's not a vacuum hose, as far as I know. it's part of the vertical adjustment
feature within the headlight. the black crowned knob outside the headlight
housing is connected to the 4" round thing via geared linkages. turn the crowned
knob and the whole reflector rotates up/down. the hose is connected to the
round thingy and terminates at the outside of the headlight housing as a simple
vented port. but what i don't know is exactly why the hose exists and placed
right there, at least without dismantling the headlight

CKonstantin

Some Xenon headlights had vacuum height adjustment as opposed to electric one. Best way is to remove the cover(as if you're changing a light bulb) and take a good look inside

Fabio D

Are u sure some xenon headlights (in the w210) comes with vaccum height adjusters? i never seen that. only electric regulation.. halogen headlights yes, comes with vaccum

Fabio Daniel

CKonstantin

If memory serves me right it was a Xenon, I only saw it once, though the headlight came from a scrap yard, so I can't tell the year or model though.

renault12ts

I have Xenons on my car...and you are correct. Xenons (at least in Europe) have self leveling activated by sensors on the front and rear axles...they also must have washers fitted.

raymond g-

i still maintain there is no vacuum line in the headlight assembly of the 210

renault12ts

Hi Raymond, you had me doubting myself for a little while then. I have a Xenon equipped car so know that the lights are auto adjusted electrically.

I did have a car with halogens and these were internally adjustable via a wheel beside the light switch in the car. This system is indeed vacuum operated or electrically operated, everything is detailed here:


http://www.neoriginal.ru/cat/mb/part...10_055_/80_015

Look for your model, then look in section 80, sub section 015 for the vacuum system, or section 82 sub section 215 for the electric system

renault12ts

You are wrong. Forgive me for quoting you back to you:

"Please refrain from posting if you don't know what you're talking about."

raymond g-

ahh, that is indeed a unique feature not generally found here with North Am cars.

my response was overly broad

renault12ts

ahh, just checked and it doesn't seem, as you say, to have been on North Am cars.

I wonder what part of the world the OP hails from, or the other poster...it does help if members fill in the user cp.

raymond g-

i was presuming north america for the OP. i've disassembled numerous 210
headlights so their description matched that of the ones I've handled. it is
not a vacuum hose/diaphram......and is different than that shown in the
diagram you referenced in post #8.

what I believe the OP was describing was this....the large white disk, with
hose terminating at the far left, just above the rectangular headlight harness
socket.

renault12ts

The black "pipe" looks like the cover for wiring. But you say it goes nowhere?

raymond g-

vent tube... no wiring. it has a spring loaded ball check at the end i believe.
was too tired to examine last night so when i get a chance, will look today.