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#1
05-21-2014, 12:21 AM
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w108 dreaded power window malfunction
A few months ago my Benz started having the typical w108 power window problem - the window won't go up all the way, the last 1-2 cm it just bounces.
Sigh... Since I had to take the door panel off the install a right side mirror (I had a convex glass cut for it by a local glass shop) I figured I might as well look at the window regulator. It turns out that the potmetal frame that holds the motor and the regulator is sort of twisted and the motor's gear was only overlapping ~50% of the teeth on the large gear that moves the window. I took the motor off, put the whole thing in the wise and bent it back as best I could, being careful not the break it! I also rotated the motor's gear so different teeth are in contact at the very end of the travel. I put it all back and so far it works. I do not know for how long... bye,
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Csaba 1972 280SEL 4.5, silver 
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#2
05-24-2014, 10:43 AM
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I don't remember exactly what the pot metal frame looks like, but if you ever have it out again, see if you can bolt a piece of reinforcing steel to the member that got bent. It is, as you noted, a weak part in the design...
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Berfinroy in CT Present vehicles: 1973 300 SEL 4.5 1959 Rolls Royce Silver Cloud I 1959 Ford Thunderbird convertible/430 Past vehicles; 1958 Bentley S 1 1976 ex-Max Hoffman 6.9 1970 300SEL 2.8 1958 Jaguar MK IX 1961 Jaguar MK IX 1963 Jaguar E-type factory special roadster 1948 Plymouth woody 1955 Morgan plus 4 1966 Shelby GT350H Mustang
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#3
05-25-2014, 04:29 PM
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there's a thread at m-100.cc that was just active last week from a guy that hand cut fresh gear teeth. A little bit of machinist know-how goes a long way when working with unobtanium. -CTH
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#4
05-25-2014, 04:38 PM
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Those regulators are available new.
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With best regards Al
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