GT-ER

They are purple and there is one on each side of the engine bay and neither are connected to anything nor can I find where they go.

mikekuriger

it goes to the headlight. what it does, i have no idea. I traced mine around and it just connects the 2 headlights together. perhaps some sort of vent?

GT-ER

Really??? LMAO...I wonder what it's supposed to do. MB is really weird sometimes.

Viper98912

Goes to the headlight and I can't figure it out either. Come on, someone has to know!

GT-ER

What I don't get it is, if they go from one headlight to the other...then why take the long way all around the engine bay? Why not take a straight shot from one side to the other on the radiator support?

Clk2C55

Maybe its to reduce condensation of some sort?

91RS

It's for the headlight washer, if your car doesn't have washers they just hang.

GT-ER

Hmmm...but the washers are in the bumper and these apparently go to the headlights. You sound sure of this. My friends C55 has headlight washers and I recall they worked without these plugged in.

Viper98912

Yup, these are plugged into the headlight, separate from the washers plugged into the bumper

GT-ER

Unplug one to see what happens.

Viper98912

I tried to when replacing the ballast and it was really stuck on there, I feared breaking it so it left it on and twisted the headlight around

91RS

I thought I was sure, my car has one that hangs down beind the washer jug next to the front pump. I didn't notice seeing a place on my xenons for anything like that to plug. Maybe it has something to do with the autolevelers.

Quickvr4

It is only used on vehicles with Xenon and Bi-Xenon headlamps. It is used for the pneumatic level switch that is located in the car, only if car has xenon headlamps. Basically there are not any leveling screws on the headlights and it is all done through vacuum servo motors.

Come on guys....everyone knows this.....

GT-ER

Hmmm...his car has xenon lamps and they face the floor pretty much. I think this will make him happy to know...lol.

GT-ER

Today I messed around with the vacuum lines and the headlights definitely do not have provisions for them. The do, however, have manual height adjustments so I aligned them and everything is great now. I guess the vacuum lines are meant to just hang there.

The car is xenon though so I guess QuickVr4 is mistaken?

jerro

seems a little strange they would just have the lines hanging there, but I've seen stranger things I guess.