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Upgraded convertible top hydraulic components for Mercedes R129 SL-Class 1990-2002

R129 SL-Class 90-02

  • Mercedes Benz R129 SL-Class | Model Years 1990 - 2002

  • Rebuild/Upgrade Service for convertible top hydraulic components on Mercedes R129 models 280SL, 300SL, 500SL, 600SL, SL320, SL500, SL60, SL600, SL73.

  • Top Hydraulics' cylinder rebuild service is widely known as the best possible option, even if you are an excellent Do-It-Yourselfer. Note also our rebuild service for hydraulic valve blocks, distributors, and pumps, as well as manufacture new, superior hydraulic hoses.

  • DIY cylinder rebuild will usually lead to unintended damage - we have seen thousands of ruined cylinders from failed DIY repair attempts! 

  • We have two order methods: Either you send in your cylinders first, or choose to "Order now with Core Exchange".

  • Model years 1990-1996 have twelve hydraulic cylinders, while 1997-2002 models have eleven hydraulic cylinders that move and lock the roadster soft top. (The left tonneau cover lock was omitted after 1996.) The original seals in the hydraulic cylinders, aka rams or actuators, will eventually fail in every R129, unless it gets wrecked prematurely, even if you never drive the car or have never used the top before. Rebuilding these cylinders is NOT a matter of changing o-rings. Every R129 cylinder has one o-ring, and those rarely ever fail. What fails most frequently, are the other seals, which have special shapes for proper function.

  • Top Hydraulics replaces and upgrades ALL seals in the cylinders with our superior proprietary material:

  1.  Rod seals. They are cup-shaped and seal the piston rod from the rest of the cylinder. When they fail, you will see fluid coming out next to the chromed shaft (rod). These are usually the first seals to fail in the cylinders.
  2. Piston seals. They seal the input and output sections from each other, as the piston slides through the cylinder. The piston seals have been made of different materials and sizes even in the same p/n cylinders throughout the years. Failing piston seals will cause internal leaks, which result in a pressure drop in your hydraulic system. Early model years have the added problem that the piston seals swell up and make it very hard to move the piston inside the cylinder. Crumbling piston seals can block valves or pinholes inside the hydraulic system, and it can be difficult to diagnose a piston seal failure without testing several cylinders once you find that your top is moving slowly or not at all.
  3. Gland seals. These are just o-rings that seal the top cap of the cylinder from the housing. They are usually the last seals to fail, but these o-rings are penny items. 
  4. Port seals. They seal the hydraulic lines where they are pushed into the cylinders. Port seal failure is becoming more and more common as the R129s age. It also applies to the front distributor p/n 1298000022. Port seals have a special shape that makes them seal under pressure. O-rings wouldn't do the trick. They are secured by precisely machined brass rings (accuracy about 1/100 mm). DIY removal of the brass rings will almost certainly destroy the brass rings. Top Hydraulics installs port seals that are tighter than the originals, just in case the hydraulic line fittings have been scratched. Cylinders and distributors upgraded by Top Hydraulics should easily outlast your car!

R129 SL-Class 90-02

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There are 16 products.

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Showing 1-16 of 16 item(s)

There are two options for placing your order:

1. (Most affordable) You send in your leaking R129 cylinders, and Top Hydraulics rebuilds them.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinders with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

OR

2. (Fastest) Core Exchange Option where Top Hydraulics ships parts from our inventory first ($1000 plus a $1000 deposit).

  • Option 2 means that you get a set of rebuilt & upgraded cylinders from Top Hydraulics' inventory first, then you ship back your original set for credit of your $1000 core refund. You get a full set that has been rebuilt to outlast and outperform OEM replacements. 
Price
$700.00
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There are two options for placing your order:

1. (Most affordable) You send in your leaking R129 cylinders & distributor, and Top Hydraulics rebuilds them.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinders with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

OR

2. (Fastest) Core Exchange Option where Top Hydraulics ships parts from our inventory first ($1080 plus a $1000 deposit).

  • Option 2 means that you get a set of rebuilt & upgraded cylinders from Top Hydraulics' inventory first, then you ship back your original set for credit of your $1000 core refund. You get a full set that has been rebuilt to outlast and outperform OEM replacements. 
Price
$780.00
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There are two options for placing your order:

1. (Most affordable) You send in your leaking Front Lock Cylinder, and Top Hydraulics rebuilds it.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinder with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

OR

2. (Fastest) Core Exchange Option where Top Hydraulics ships the part from our inventory first ($75 plus a $60 deposit).

  • Option 2 means that you get a rebuilt & upgraded cylinder from Top Hydraulics' inventory first, then you ship back your original part for credit of your $60 core refund. You get a cylinder that has been rebuilt to outlast and outperform OEM replacements.

P/N 1298001672

Price
$45.00
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There are two options for placing your order:

1. (Most affordable) You send in your leaking Rear Lock Cylinder, and Top Hydraulics rebuilds it.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinder with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

OR

2. (Fastest) Core Exchange Option where Top Hydraulics ships the part from our inventory first ($85 plus a $60 deposit).

  • Option 2 means that you get a rebuilt & upgraded cylinder from Top Hydraulics' inventory first, then you ship back your original part for credit of your $60 core refund. You get a cylinder that has been rebuilt to outlast and outperform OEM replacements.

P/N 1298002172

Price
$55.00
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Price listed is for Standard Rebuild Service- You send in your cylinder(s) to be rebuilt.

Expedited Core Exchange Option includes a $200 Refundable Core Charge plus a $50 surcharge for inventory management.

P/N 1298000272

Price
$95.00
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There are two options for placing your order:

1. (Most affordable) You send in your leaking Tonneau Cover Lock Cylinder, and Top Hydraulics rebuilds it.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinder with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

OR

2. (Fastest) Core Exchange Option where Top Hydraulics ships the part from our inventory first ($85 plus a $100 deposit).

  • Option 2 means that you get a rebuilt & upgraded cylinder from Top Hydraulics' inventory first, then you ship back your original part for credit of your $100 core refund. You get a cylinder that has been rebuilt to outlast and outperform OEM replacements.

P/N 1298000072

Price
$55.00
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There are two options for placing your order:

1. (Most affordable) You send in your leaking Tonneau Cover Lift Cylinder, and Top Hydraulics rebuilds it.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinder with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

OR

2. (Fastest) Core Exchange Option where Top Hydraulics ships the part from our inventory first ($85 plus a $100 deposit).

  • Option 2 means that you get a rebuilt & upgraded cylinder from Top Hydraulics' inventory first, then you ship back your original part for credit of your $100 core refund. You get a cylinder that has been rebuilt to outlast and outperform OEM replacements.

 P/N 1298002072

Price
$55.00
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You send in your leaking Left Bow Extension Cylinder, and Top Hydraulics rebuilds it.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinder with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

Core exchange is not available for these cylinders at this time

P/N 1298001772

Price
$95.00
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You send in your leaking Right Bow Extension Cylinder, and Top Hydraulics rebuilds it.

  • Top Hydraulics replaces & upgrades ALL seals in your cylinder with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

Core exchange is not available for these cylinders at this time

P/N: 1298001872 (interchanges with 1248000272)

Price
$95.00
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There are two options for placing your order:

1. (Most affordable) You send in your malfunctioning R129 Hydraulic Pump, and Top Hydraulics rebuilds it.

  • The rebuild includes electric motor replacement or rewinding if necessary, service of hydraulic valves, and upgrade of internal seals in the pump to eliminate current or future pressure loss or internal bypass. Three years warranty.

OR

2. (Fastest) Expedited Core Exchange Option where Top Hydraulics ships parts from our inventory first

(includes a $200 Refundable Core Charge).

  • Option 2 means that you get a rebuilt & upgraded pump from Top Hydraulics' inventory first, then you ship back your original part for credit of your $200 core refund. Top Hydraulics ships the pump as pictured. You get a pump that has been rebuilt to outlast and outperform OEM.

Price
$400.00
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There are two options for placing your order:

1. (Most affordable) You send in your leaking Front Hydraulic Distributor, and Top Hydraulics rebuilds it.

  • Top Hydraulics replaces & upgrades all six seals in your distributor with much tighter, durable square shoulder seals. Top Hydraulics' seals have a far more reliable seal and much longer service life.

OR

2. (Fastest) Core Exchange Option where Top Hydraulics ships the part from our inventory first ($140 plus a $100 deposit).

  • Option 2 means that you get a rebuilt & upgraded distributor from Top Hydraulics' inventory first, then you ship back your original part for credit of your $100 core refund. You get a distributor that has been rebuilt to outlast and outperform OEM replacements.

Price
$110.00
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You send in your malfunctioning hydraulic valve block, and we rebuild it for $200.

P/N: 1298002378

Price
$200.00
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  • You send in your leaking pair of Roll Bar Cylinders, and Top Hydraulics rebuilds them.
  • Top Hydraulics replaces & upgrades ALL seals in your cylinders with our superior proprietary material including rod seals, gland seals, port seals, plug seals and piston seals. Top Hydraulics' u-cup seals have a far more reliable seal and much longer service life.

 

Price
$400.00
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Rebuild & Upgrade Service for your 1990-1995 R129 SL-Class ADS Suspension Valve

Send in your 1990-1995 R129 ADS Suspension valve for Top Hydraulics' Rebuild and Upgrade service. Includes upgrade of over a dozen seals.

We do not offer core exchange, and we do not rebuild the newer ADSII valve p/n 1293201258.

Mercedes Benz p/n 1293200058 or 1293200858. The valve mounts to the distributor p/n 1293270189.

Price
$500.00
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New hydraulic line for 1990-1994 Mercedes R129 SL-Class

This is a single hose that runs from the hydraulic pump reservoir to the right side solenoid valve block.

Top Hydraulics' hose material is more flexible than the OEM material and holds up to ten times the operating pressure in your convertible top hydraulic system.

Price
$199.99
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There are two options for placing your order:

1. (Most affordable) You send in your leaking Rear Hydraulic Distributor, and Top Hydraulics rebuilds it.

  • Top Hydraulics replaces & upgrades all four seals in your rear distributor with much tighter, durable square shoulder seals. Top Hydraulics' seals have a far more reliable seal and much longer service life.

OR

2. (Fastest) Core Exchange Option where Top Hydraulics ships the part from our inventory first ($60 plus a $50 deposit).

  • Option 2 means that you get a rebuilt & upgraded rear distributor from Top Hydraulics' inventory first, then you ship back your original part for credit of your $50 core refund. You get a distributor that has been rebuilt to outlast and outperform OEM replacements.
  • Please note:
  • There are 3 different, but similar distributors in the R129. Please select which port numbers appear on your distributor so we can be sure to send you the correct part.
Price
$50.00
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