M-Class (W166) Produced 2012-2015

how to clean the headlights?

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Old 04-08-2012, 01:04 AM
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how to clean the headlights?

how does one activate the headlight washers?
Old 04-08-2012, 12:46 PM
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Headlamp washer operation

Originally Posted by 300DTurbo
how does one activate the headlight washers?
The secrets in the manual...
Attached Thumbnails how to clean the headlights?-headlamp-washers.jpg  
Old 04-08-2012, 02:50 PM
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Originally Posted by GregW / Oregon
The secrets in the manual...
My W164 has these headlight washers too, without a dedicated switch...stupidest design, ever.
Old 04-08-2012, 03:10 PM
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People its a passive system as our friend Greg has shown. I do not know any manufacturer that has a dedicated system for headlights. Clean headlights are not required by law but a clean windshield is. You complainers would be the first top ***** when you ran out of washer fuild for the windshield right??? I don't like it either I would like a dedicated system but $$$$
You could get what Audi has lights get cleaned everytime you wash the windshield but that sucks as overkill getting rid of bugs.. Dont worry gang be happy :o)
Old 04-08-2012, 03:17 PM
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My SL550 has a button that I can push and it cleans the headlights. I guess it is a different system.
Old 04-08-2012, 03:44 PM
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Great news but it is a more expensive vehicle > I prefer that if separate tank
All in all light washers are a great bonus.
Old 04-08-2012, 04:21 PM
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M-B used to have a manual switch for all vehicles equipped with headlight washers (my W163 had one), but they have moved away from it to the current passive system that activates itself in conjunction with the # of windshield wash cycles.
Old 04-08-2012, 09:33 PM
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Originally Posted by jon2002
My W164 has these headlight washers too, without a dedicated switch...stupidest design, ever.
Not a fan of auto headlight washers - spray everywhere, usually when you don't need them.
Old 04-08-2012, 10:52 PM
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Originally Posted by jon2002
My W164 has these headlight washers too, without a dedicated switch...stupidest design, ever.
My 2006 W164 has a dedicated switch for the Headlight washers. It is not visible when sitting in driving position. It is placed between the Lights switch and the steering column. It is great to clean slush and mud after snow storms. Details on page 194 in the Owner's Manual.
Old 04-08-2012, 11:05 PM
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Headlights will squirt if you hit the spray button 4 times in succession on the stalk, you get 2 squirts on each side. You have to hit em fast. Its not that great of a system. Just makes a big mess everywhere.
Old 04-09-2012, 10:28 AM
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It's a great system ONLY during the winter months, with lots of highway driving. On the Audi's you can Vag-Com it and have it deactivate. Wonder if you can do the same with MBs.

During the summer months sometimes you need to clean off the bugs on the windshield on a fairly clean car, but it just make a mess like someone mentioned.

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