Wewannabenz

I've been searching for a pic on where the adjustment screws are for the W166 ML350 halogen headlamps, and am having a heck of a time. Can someone tell me where they are, and which one adjusts height vs left/right orientation? Thanks!

Wewannabenz

Well I guess no one adjusts their headlamps.

The G Man

Its on top of the headlight, there is a 1/2" hole on the metal housing on top of the headlight. Look thru that hole and you will see a white plastic hex Allen screw, you can turn that screw with a long Allen T handle wrench or a long flat screwdriver. With the car on, put the headlight in manual on and if I remember right, CW is down.

Wewannabenz

Many thanks!!

csml350

I installed LED low beam today and the aim is horrible! After hours of tinkering with the only adjuster, the vertical I believe, I realized the horizontal is the issue. Does anyone know where the adjuster for horizontal adjustment is?

DanD.

I looked and looked. Don't see that hole. Can you post some pics? Please.

The G Man

Forget the hole, just look for the white plastic hex screw on top of the headlight. Take a look at the pic above, its the plastic screw in the bottom right of pic, be careful, that screw is easy to strip.

Diabolis

AFAIK there is no horizontal adjustment... and even if there is/was one, chances are it wouldn't do you any good. While LEDs look cool, their beam pattern is very different from that of a halogen bulb and the result is outright unacceptable if you're actually trying to illuminate the road instead of trying to look cool to oncoming traffic. A (somewhat) better option is to go with HIDs, and even those are not going to be ideal.

See discussion at https://mbworld.org/forums/new-m-cla...-question.html (and excuse the fighting... it has since been amicably resolved).

csml350

Thanks for the info. I did switch to HID and moved the LED to high beams. LED's range was too short for me and the cutoff is almost non-existent. For HID the cutoff is still quite horrible compared to OEM lights on my previous cars but at least it's a projector in there...I had a 328 with halogen bulbs and it was much harder to retrofit HID due to reflector housing.

I guess that'll do it for now. Never gonna buy a car without OEM HID in the future =(