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#1
10-24-2011, 02:42 PM
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W124 ASD switch
Hello!
I wonder if it is possible to force ASD to work from standing still. I mean I have a 300TE and I had a pretty bad experience in winter, when I tried to turn around and got stuck in a track in slightly iced snow. Swithing from D to R and back made no sense, because ASD doesn't block when the car stands still. It works from 10 km/h I think. It blocks so good, so I can lay some significant amount of rubber doing donuts when it rains. It blocks on dry road at WOT aswell. Is that possible to wire a somekind of a switch to force ASD to block to avoid such situations? Or my ASD doesn't work properly? When I start at WOT with the front wheels turned it usually blocks, but it doesn't block on slippy surfaces. Thank you! Alex.
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1988 Mercedes-Benz 300TE 1984 Toyota Celica GT-R AA63 (JDM) 1989 Audi V8 3.6 quattro Last edited by whatever; 10-24-2011 at 03:10 PM. 
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#2
10-24-2011, 04:39 PM
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Getting a TE Mercedes stuck in light snow is not the cars fault! That's just you being clumsy. ASD is not supposed to block anything, it locks the differential to minimize wheel spin. You doing doughnuts tells the rest of us the ASD is working just like it should do.
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600SEL '91  300E 4Matic '88 240D '83  280SE '77  350SE '73  The most complex systems can fail in the simplest way. Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis. i don't believe in the lord! He's never bought me a Mercedes Benz.
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#3
10-24-2011, 05:42 PM
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It's likely the clutches in your differential are worn out making the ASD mostly ineffective.
Did the warning lamp illuminate in the cluster? If so the ASD was trying to lock the differential. As I understand it ASD works from a standstill. It's a very simple system, you could hook the one solenoid up to a manual button if you wanted. -J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#4
10-24-2011, 06:48 PM
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How did you get stuck? Are your tires bald?
My 300E without ASD has made it through 4 Colorado winters (on 17" tires!), didn't try dedicated snow tires until last year. Car is an absolute TANK. Never got it stuck once. Snow is coming soon here in Colorado and I still need to find winter tires.... 
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http://i193.photobucket.com/albums/z...-RESIZED-1.jpg 1991 300E - 212K and rising fast...
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#5
10-24-2011, 07:55 PM
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Your 300E has ASR not ASD probably... different system that uses the brakes to "lock" the diff.
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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