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#31
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___________________________________________ 1992 300D 2.5 Turbo
W124.128/OM602.962/4G-Tronic 722.418 Dieselmeken 7,5mm | Sportline Interior My Build Thread |
#32
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There are a couple of screws on the motor itself that allow it to come out of the housing. It's been >18 months since I've had mine apart, so I don't remember the specifics. The whole worm gear part will pull out of the motor "can". You'll see the important parts inside.
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Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#33
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I decided just to spring for a new motor, because I want to get this done ASAP and move on to bigger projects. The OE part is anywhere from $300-$400, which is crazy. THE OEM Bosch part was discontinued in 2013 and is NLA. eBay is full of salvaged parts that are cheap, to be sure, but could fail tomorrow for all anyone knows. I finally settled on a reman from AutoZone because it should be delivered to my front door by the end of the week, and it was only about $100 with free shipping, a 10% off coupon, and the core charge refund. Maybe it won't last another 25 years, but I suspect I'll have bigger problems before then anyway, lol. BONUS ROUND! There are a few things I still don't get. One is this extra slider, item #1 in the picture below. It was just sitting there, in the window rail, not attached to anything. It's shown in the EPC diagram - but again, not attached to anything - which is odd - surely it serves some function? #2 is a body-colored vertical rail. Is that just structural reinforcement, or is there supposed to be a slider in there? FOr example, item #3. Clearly some sort of slider, same plastic as the others and greased up the same as well. I found it loose in the bottom of the door. That can't be good, right? lol
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___________________________________________ 1992 300D 2.5 Turbo
W124.128/OM602.962/4G-Tronic 722.418 Dieselmeken 7,5mm | Sportline Interior My Build Thread |
#34
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http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD2/Program/Chassis/72-185.pdf
There are normally three sliders. The "extra slider" is the front "slide shoe" that attaches to the front lower regulator arm (Fig. 172-29717 by step 6). It may have been left behind from a prior repair of the regulator arm, and that's probably why you have an extra. The metal pin that attaches it to the regulator arm is missing. The rear slide shoe attaches to the rear lower regulator arm (right side of Fig 172-29710 by step 7). The front and rear slide shoes are attached to your regulator arms, so you can safely remove and discard the "extra slider". The "mystery slider" is partly visible in the left side of Fig. 172-29710 by step 7. It ties the rear vertical guide rail to the horizontal guide rail. It should be re-installed. The three sliders are also visible in the photo on Post 5 of this thread: sticky or DIY for front window regulator replacement? - Mercedes-Benz Forum Hope this helps.
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78 W116 300SD 'Desert Rose' new as of 01/26/2014 79 W116 300SD 'Stormcloud' RIP 04/11/2022 |
#35
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That's kind of disappointing about the motor not coming apart. I suspect Bosch changed the design slightly between 1986 and the mid 90s, so that's kind of a bummer.
That curved sliding piece does go in that body colored channel. When I looked up info for my SDL it gave the part number in the EPC for it, but gave no mention where it was installed. Both of mine were down in the bottom of the door, so it took some trial and error to figure out just where they went. It serves 2 purposes - it helps to guide the window and it helps to keep it from rattling or jumping the track when partway rolled down and the door is slammed. If you have slides that are missing or broken, the extra strain on the motor could be what's been causing you grief.
__________________
Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#36
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Gosh, I feel so dumb! Parts #1 and #2 in the pic above (AKA extra slider and mystery slider) are in fact THE SAME PART, which serves to connect the regulator to the body-colored rail (#3). It broke in half! Which explains why half of it was still captive in the regulator, and the other half, which rides the rail, fell down to the bottom of the door. And also probably explains the extra stress on (and eventual failure of) the motor, as Diseasal300 mentioned. Well, another part to order. Nice to put that one to bed, lol.
On another note, any suggestions on what to lube up the new motor and sliders with? I've got a little bit of Gleitpaste, some white lithium grease, some graphite powder...and an O'Reilly's in town.
__________________
___________________________________________ 1992 300D 2.5 Turbo
W124.128/OM602.962/4G-Tronic 722.418 Dieselmeken 7,5mm | Sportline Interior My Build Thread |
#37
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Mystery solved. LOL!
I used silicone sunroof grease to lube the tracks in the SDL. Seems to be what Mr. Bergsma recommends as well. I chose it since it won't harden or react with water, so it won't become "gummy" as it ages.
__________________
Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#38
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Well, everything was going great, until this happened:
Still not sure what went wrong, exactly. Got everything back together and tried raising and lowering the window. I was getting some resistance and binding, and kept disassembling and reassembling - the main issue was how exactly to fit that "sliding jaw" (the so-called "mystery slider" from a couple posts prior). No matter where I put it, it seemed to interfere. I finally just removed it entirely to check if there were any other points where the window was binding. I started to raise the window, everything looked good, and all of a sudden without any warning at all - BOOM! - the glass shattered into a million pieces. Now that there's no glass there, the regulator moves up and down without any problems, lol. So I know the regulator is more or less assembled correctly. But I still have two problems:
Anyone have any insight into problem #1? For problem #2, I found an OE used window for $39. Pretty good deal, but I'm afraid of repeating the experience if I don't get to the bottom of why the glass broke in the first place... Now, if you'll excuse me, I've got a huge mess to clean up! lol
__________________
___________________________________________ 1992 300D 2.5 Turbo
W124.128/OM602.962/4G-Tronic 722.418 Dieselmeken 7,5mm | Sportline Interior My Build Thread |
#39
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Also, is this where the sliding jaw goes? (Obviously the window rail is not pictured)
It's the only arrangement I can figure out that makes any sense, except that it's impossibly tight, no matter how much you lube up the slider and track. It's going to burn out the window motor in no time if I run it this way.
__________________
___________________________________________ 1992 300D 2.5 Turbo
W124.128/OM602.962/4G-Tronic 722.418 Dieselmeken 7,5mm | Sportline Interior My Build Thread |
#40
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The sliding jaw you show does appear to be in the right spot, although it appears to be a different design than the original one you show further up the page. Are you sure it's the correct part? It should be a snug fit, but not tight.
Before putting in the new window, it would be a good idea to find out what bound up and broke the one you have. I'd suspect it jumped a track! When they do break, it's pretty alarming. I had a rock come in through my front passenger window in a construction zone once. I thought I'd been shot! Talk about a loud noise! BOOOOOOM!!!!!!!! Had that car for another 4 years and was still finding little shiny diamonds in places when I traded it in...
__________________
Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
#41
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My whole day was ruined - was going to put my BMW on jack stands and drain the engine oil and transmission overnight, but now I don't have the garage space to do so (don't want to move the Mercedes outside with a broken window because it's been raining off and on). Oh well!
__________________
___________________________________________ 1992 300D 2.5 Turbo
W124.128/OM602.962/4G-Tronic 722.418 Dieselmeken 7,5mm | Sportline Interior My Build Thread |
#42
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The window should move up and down freely in its tracks, even if the sliding jaw isn't installed. I haven't worked on a 124, but the 126 has tracks in the doors that the window glass rides in. It's very easy to get the front edge out of the track, especially if you've been fiddling with the window. When you try to roll it up, it will bind, if you don't catch it, it doesn't take much to shatter the glass.
I mention the design of the sliding jaw since it looks different than the one you removed. The new one I bought for the SDL looked exactly like the broken one you had. It would make sense that it would be a tight fit if the one you have now is designed for a different chassis.
__________________
Current stable: 1995 E320 149K (Nancy) 1983 500SL 120K (SLoL) Black Sheep: 1985 524TD 167K (TotalDumpster™) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) |
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