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$45.00 - $780.00
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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- Select your model year:: 1993
Price listed is for Standard Rebuild Service - You send in your cylinders to be rebuilt.
Expedited Core Exchange Option includes a $600 Refundable Core Charge plus a $300 surcharge for inventory management.
Entire set of 11 or 12 cylinders
Note: As of August 15, 2023, there is currently a turnaround time of 2-3 weeks for rebuild/upgrade service where you send in your R129 cylinders first, and about one week lead time for core exchange orders.Price$700.00Price listed is for Standard Rebuild Service - You send in your cylinders to be rebuilt.
Expedited Core Exchange Option includes a $600 Refundable Core Charge plus a $300 surcharge for inventory management.
Entire set of 11 or 12 cylinders plus Front Distributor (as pictured).
Note: As of August 15th, 2023, there is currently a 3-week turnaround time for rebuild/upgrade service, and a 1-week lead time for core exchange orders.Price$780.00Price listed is for Standard Rebuild Service- You send in your cylinder(s) to be rebuilt.
Expedited Core Exchange Option includes a $60 Refundable Core Charge plus a $30 surcharge for inventory management.
Mercedes R129 models SL280, SL320, SL500, SL600. P/N 1298001672
Price$45.00Price listed is for Standard Rebuild Service- You send in your cylinder(s) to be rebuilt.
Expedited Core Exchange Option includes a $60 Refundable Core Charge plus a $30 surcharge for inventory management.
P/N 1298002172
Price$55.00Price 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$95.00Price listed is for Standard Rebuild Service- You send in your cylinder(s) to be rebuilt.
Expedited Core Exchange Option includes a $100 Refundable Core Charge plus a $30 surcharge for inventory management.
Mercedes R129 models 300SL, 500SL, 600SL, SL320, SL500, SL60, SL600, SL73. P/N 1298000072
Price$55.00Price listed is for Standard Rebuild Service- You send in your cylinder(s) to be rebuilt.
Expedited Core Exchange Option includes a $60 Refundable Core Charge plus a $30 surcharge for inventory management.
Mercedes R129 models SL280, SL320, SL500, SL600. P/N 1298002072
Price$55.00Price listed is for Standard Rebuild Service - You send in your cylinder(s) to be rebuilt.
Expedited Core Exchange Option includes a $250 Refundable Core Charge plus a $60 surcharge for inventory management.
(p/n 1298001872 interchanges with 1248000272)
Price$95.00You send in your malfunctioning convertible hydraulic pump for rebuild.
Expedited core exchange option is available and includes a $100 inventory surcharge plus $200 core deposit.
For model year 1997, we need to know the part number on your pump so we can send you the correct part.
Price$400.00New 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
