ISO Rear Hydro-Pneumatic Shock - Mercedes-Benz Forum
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post #1 of 15 (permalink) Old 07-19-2019, 01:58 PM Thread Starter
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ISO Rear Hydro-Pneumatic Shock

I need a Hydro-Pneumatic Shock for the rear of a 1991 560SEL with SLS. The part number is: 126 320 4613. They are NLA from Mercedes. If someone is willing to sell me one, please PM me.
Thanks, SwissCheese.
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post #2 of 15 (permalink) Old 07-19-2019, 02:28 PM
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This topic came up recently so there is info for you in the search archives I think.

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post #3 of 15 (permalink) Old 07-19-2019, 07:31 PM
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Just curious, does anyone know if lower mileage but older original to the car struts would have less bounce/resistance than high mileage but just as old struts? Since the car is horizontal and the struts are vertical as is gravity, I just wonder how much driving (unless someone is going over lots of hills and bumps) vs sitting contributes to the struts excessive bounce over time. Since NOS are now practically unobtanium, are lower mileage ones just as old only fractionally better than original to the car?
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post #4 of 15 (permalink) Old 07-19-2019, 08:23 PM
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The Rams rarely wear out, nitrogen sphere's provide the dampening
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post #5 of 15 (permalink) Old 07-20-2019, 06:40 AM
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Quote:
Originally Posted by SwissCheese View Post
I need a Hydro-Pneumatic Shock for the rear of a 1991 560SEL with SLS. The part number is: 126 320 4613. They are NLA from Mercedes. If someone is willing to sell me one, please PM me.
Thanks, SwissCheese.
PM sent.
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post #6 of 15 (permalink) Old 07-20-2019, 02:18 PM
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Originally Posted by humblejoe View Post
The Rams rarely wear out, nitrogen sphere's provide the dampening
Yes, but if you push down on a worn one, it has little resistance; a new one should be difficult to push down. I'm having the sphere's replaced and figure after thirty-two years new struts/shocks would make sense, especially since all the fluid leaked out long ago.
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post #7 of 15 (permalink) Old 07-23-2019, 12:24 PM
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Quote:
Originally Posted by DrewPT View Post
Yes, but if you push down on a worn one, it has little resistance; a new one should be difficult to push down. I'm having the sphere's replaced and figure after thirty-two years new struts/shocks would make sense, especially since all the fluid leaked out long ago.

All the fluid never leaks out, the system just keeps pumping more fluid in. After 32 years you do need new spheres.

If you really want a new struts here are some:
https://www.ebay.com/itm/Mercedes-re...sAAOSwaSVcN5zz
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post #8 of 15 (permalink) Old 07-23-2019, 02:31 PM
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Drew,

The 126 rear units look really different than those ones in the ebay ad..

The mounts differ with a ball socket at the bottom.

SACHS 102 215

MB 126 320 48 13


M.
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post #9 of 15 (permalink) Old 07-23-2019, 02:45 PM
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Correct, the W126 had the option for full hydro (HPF) system, but this option is super rare to find here in NA. You will likely find these on 500 SEL's from the mid to late 80's as full grey market imports into the US. Thus unless the OP has the full hydro system (unlikely) then they will not be able to use the 6.9 type struts. These are of course long since "NLA" via Benz, and priced accordingly if you can find NOS ones, as in the ebay link. Very much unobtainium nowadays.
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post #10 of 15 (permalink) Old 07-23-2019, 03:05 PM
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Quote:
Originally Posted by MBL87560SEC View Post
Drew,

The 126 rear units look really different than those ones in the ebay ad..

The mounts differ with a ball socket at the bottom.

SACHS 102 215

MB 126 320 48 13


M.
$200 each brand new from Mercedes dealership
https://www.mbpartsmiami.com/oem-par...ing-1263204813
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