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  #1  
Old 08-02-2003, 01:36 AM
mike690003's Avatar
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My newest Mod--->One -Touch rolldown and rollup windows in my 300E

Hello Board,

Today I was bored and came upon an idea...What if I could get my car to have one touch roll up an down windows. Well, I took the window switch apart and started investigating. I opened the window switch with a small pocket knife, I saw that there were 2 small BB's that I guess aided in the up/down movement. I removed the 2 BB's and attached the switch cover back on. I plugged the switch in and with my fingers crossed I pressed the window switch up....It Worked!!!, I pressed it down...It worked!!! All I had to do was remove the 2 BB's out of the window switch and wham! one touch roll up and down windows are in my 300E. Now I don't have to hold the switch up or down anymore, all it takes is one press. I did this to all four window switches on my console. I do not know if the window switches are the same kind in all older MB's, but these are the steps I did in my 1987 300E.

Anyone care to do it to their cars???
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  #2  
Old 08-02-2003, 02:18 AM
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The switch won't click back to the original position though, will it?
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  #3  
Old 08-02-2003, 02:21 AM
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No it will not, but hey, its worth it. For me at least.
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1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
HID/Xenon (D2S)
Keyless Entry
Monochromatic Paint (Custom Blue)
Smoked Tails
Flat Badged (front)
Debadged (rear)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS
http://memimage.cardomain.net/member.../352975_67.jpg
http://memimage.cardomain.net/member.../748335_24.jpg
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  #4  
Old 08-02-2003, 05:38 AM
azhari
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Without the BBs, after the window reaches it's up or down limit, the window regulator is still energised, isn't it - due to the permanent contact of the switch at either end without the BBs to back them to the middle.

Won't the regulators be working overtime?

Just a thought, though the one-touch idea is superb if nothing else is mechanically/electrically compromised.

I have done a repair on my front power window switch before and understand exactly what you have done.

I thought it was a good idea to remove the BBs but was worried about the window regulators being engaged till you touch the switch a second time to disengage it.Then it wouldn't be one-touch anymore, now would it?

My 2 cents.
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  #5  
Old 08-02-2003, 06:00 AM
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The window motor cuts out when it reaches the full up position. However, I would think that current still flows through the circuit when the window motor is off and the switch is depressed.
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  #6  
Old 08-02-2003, 08:49 AM
azhari
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Yes, in some Mercs I noticed if the switch is still depressed when the window reaches its up/down limit, the dome lights will dim - so current obviously still flows.
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  #7  
Old 08-02-2003, 10:43 AM
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I know my my car the window motors are still engaged when you hold the switch, but they are not moving because there is nowhere for the window to go. I would not do this on my car, but if there is a breaker in the ciruit to cut out the current to the motor when it is full opened or closed, then I don't see why not.

xp
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  #8  
Old 08-02-2003, 01:54 PM
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Check out this link to BergWerks. They have a proper kit to provide for one-touch window switches for only $100 for 2 windows (they estimate DIY installation at 3 hrs).

http://bergwerks.com/1_touch_win.jsp

Here's a list of everything they supply for the W124:

http://bergwerks.com/e_w124.jsp

Gary
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  #9  
Old 08-02-2003, 09:46 PM
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Location: Omaha, NE
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Safety hazard!

No one has mentioned the safety problem posed by this modification. Doing the 'one touch up' as described poses a very significant safety risk. Cars which come from the factory with one touch up have sensors to reverse the motor if an obstacle (like a child's neck or a dog's snout) is encountered. (The Bergwerks one apparently does come with safety sensors.)

Not to mention the very real legal liability if you sell this car to someone who inadvertantly injures themselves or a passenger ...
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  #10  
Old 08-02-2003, 10:05 PM
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A comment or footnote regarding the BB's in the window switches.

I have taken apart more switches than I would like to admit over the years and have found that all switches with the "BB's" also have springs inside the rocking portion of the switch. The springs push down on the BB's to have the switch contacts return to center.

I.E., you let go of the switch and it returns to middle or off position.

BTW-

1)cleaning these switches in not very hard and should be done every 100k or so. Just be sure to take them apart on a towel or something so the little parts including the BB's don't roll away. (Don't ask me)

2) these switches are incredible to me. They show how incredibly imaginative Mercedes can be. Simple, reliable, probably never wear out. Amazing!

BUT .... they also show how that "additional thought" could also have been employed. These switches almost always fail due to spilled fluids and/or dirt falling into them.

If Mercedes had created the rocker portion whose edges were larger than the switch body itself, nothing would have even fallen inside.

Sorry, just had to share that.

Haasman
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