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2011 GLK,2007 S550,2003 S55,2008 CLK,2009 C300,1996 E300,2005 E320,2002 E3
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Discussion Starter #1
Fellas:
I got my 91 560SEC from the shop today with my half axle getting replaced. I was going to get a quote on the leaking rear accumulator, but the indie said that it was my lines and they were bad in several places. I dont want to replace them and want to bypass them and go with shocks and springs. Does anyone that did this swap have model and part numbers for the springs and shocks that can support the same ride height of the factory setup. The reason that I chose not to repair the lines is that I dont drive the car much and may have to do my tranny soon. I am trying not to get divorced behind all of these random
(husband hobbies) for cars that I rarely drive.

Thanks a ton guys,
 

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Two '87 570SECs, one '87 560SEL
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I'm in the middle of the conversion of the FrankenBenz (SEC) to non-SLS. In your car, you'll have to:
remove the hydraulic pump from the front of the engine,
remove and discard the hydraulic reservoir,
remove the hydraulic rams inside the rear springs,
Remove the rear springs
Remove the accumulators
remove the SLS valve attached to the rear sway bar.

You'll need:
a blanking plate for the engine
non-SLS springs for the rear
Bilstein shocks to match the fronts

Other than that, it's easy. :)
The SLS is one of the nice features in an SEC. I'd see if a salvage yard has the lines you need to replace since it's easier than the conversion.
 

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Discussion Starter #3
why would everything have to be removed vs just swapping out the the shocks and springs?
 

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The pump will seize without flow through it, which will then do ugly things to the timing chain, etc. The accumulators can be used on another car. The rear springs are too soft without the hydraulic assist and will let the tail drop about two more inches so they have to be replaced.

Tried to send you a PM but you have that turned off. I have a spare engine blank and once all the springs I just purchased make it my house, I should have a spare set of non-SLS H&R springs.

RJ still has a set of Bilsteins to sell from his non-SLS car.
 

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Discussion Starter #5
mramay:
I thought my pm was active. I will shoot you a test message. WOW so if there is a leak in the lines, the system cant be terminated at the pump? How many functions other funtiona are on the same system as the hydraulic setup? I assumed the system was seperate due to the fact that I have had MB's without it. I picked up the car yesterday and it was bouncing like a Lowrider(SAD FACE). I took it straight to the garage. For some reason this car is special to me, which is why i want to keep it around, but not go for broke on the project. I once had to do a similar swap on my XJ6 VDP jaguar, and just was able to replace the springs and shocks.. Thanks for all the help guys.
 

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Got your PM but my reply got this: "4benzes has chosen not to receive private messages or may not be allowed to receive private messages. Therefore you may not send your message to him/her."

Don't forget that the "sent" messages are part of your total allowed messages. Delete them too.
 

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Discussion Starter #7
WOW this is like voting at the elections when no means yes and yes means no on the ballots..I think that I went into the settings and fixed it so that I can receive them, though they had all come through before.

This SEC is such a rare car that Im looking forward to getting the rear suspension together.
As with most MB's the front suspension is solid and the interior is great as well. It has the area in the front fenders that rusts by the corner light like many other 126's, but overall its a nice car. I am the third owner. The first owner maintenanced the car religiously for 150k. The second owner didnt do much, so I have some catch up to do. Thanks for the help.
 

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Just tried another PM and it got rejected too.

Any Moderators here that can help??

Mike
 

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Discussion Starter #9
After looking online, I found some nice priced Bilstein shocks and some springs. Is it fine to use the rear shock and spring setup from a SEC w/o the self leveling suspension to replace the current setup?
 

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93 190E 2.6; 82 300 SD Turbo
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Lines arent that expensive, the SLS is nice when its fully functional. I just helped a buddy of mine repair his on his 560SEL, total was about $250, replacement rams, accummulators and pump. all used of course but in fine working condition. He has a leak somewhere up front, most likely the main pressure line...






Check out Parts.com for prices,
 

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The leak "up front" is very likely the pump itself. The kit MB sells you to rebuild it doesn't have all the o-rings needed and it will continue to leak - BTDT. Take the pump off, take it COMPLETELY apart and go to your local hydraulic hose repair shop (e.g., the guys with all the o-rings) and get another set of viton o-rings. Fixing this $1100 (!) pump is easy with about $5 worth of o-rings.
 

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Discussion Starter #12 (Edited)
Mike here is my main issue. I have two of my MB's that I am currently working on, and with it being cold and snowing on Cleveland---i just cant get to it. I trust my indie to do the job and do it well, but it comes to--- do I just want the car driveable vs the want for the SLS. The suspension issue is kind of the tip of the iceburg with the 126. This car was very well maintained by the first owner. I have a 1" folder of all repairs. The second owner didnt do much. The reverse gear is slipping, which will be another costly repair, and I have to check on the cooling unit, as well as I will probably repaint it(though its not to bad). If the suspension issue were the only thing wrong with the car, I would do the lines and all other related parts, but I really want to do the shock/spring conversion due to the amount of other repairs and because im working on my 129 and 201. I drove it yesterday to move it to storage and almost got dizzy from the bouncing.
 

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there is nothing wrong with 'normal' four coil non-pneumatic suspension, some of our cars came with it standard and they handle quite well.

The rear springs can get tired and need replacing, I replaced mine about two years ago just to improve the rear handling.

I have not tried driving with two heavy adults in the rear seat however.
 

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Discussion Starter #14
Ross:
Will the OEM non SLS shock and spring setup work fine(meaning) can I just buy the Bilstein shocks and springs from a non adustable car and swap things out?
 

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Discussion Starter #16
I think thats what im going to do. This car is a monster!
With each MB group thinking that they have the best model MB, Im not sure my W140 rides like this 91 W126. I had them side by side this summer while a buddy was driving my 95 S420 and I walked away from him. The 560SEC is an amazing car.
 

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4benzes, I just noticed that your from Ohio! Good to see people (relatively) in my area on the benz forums. I'm down in Youngstown, pretty MB scarce area as far as I've seen.

Aside from the dealer and my indy I'm pretty sure I have one of the higher concentrations of MBs in the area LOL
 

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Discussion Starter #19
Does anyone know who online sells the blanking plate for the suspension pump?
 

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The tubing in the SLS system is the "shock absorber" since the viscosity of the SLS fluid is what sets up the difficulty in moving it in and out of the accumulator, so with leaking tubing, it's not surprising it's bouncy.

Before I removed the system, I'd check the accumulators to see if they're fine. If they good, then it's easier (cheaper too) to fix the system. If an accumulator is bad, then it's another expensive replacement piece pushed into the equation.

The center portion of the pump is just sitting in there, kinda held in place by the o-ring on the side of the center lump. I just smacked the pump face "gently" onto a piece of wood to get center lump moving then into my palm again to get it out.
 
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