We offer a complete seal kit / repair kit for the top hydraulic cylinders used in Mercedes SLK R170 models.
This seal kit contains parts to replace the rod seals of the following hydraulic cylinders:
1 x 170 800 0072 (front lock cylinder)
1 x 170 800 0272 (trunk lid cylinder)
1 x 170 800 0372 (trunk lid cylinder)
1 x 170 800 0572 (main lift cylinder)
1 x 170 800 0672 (main lift cylinder)
The issue: A lot of Mercedes convertible owners are aware of the well known problem: After a while the hydraulic cylinders responsible for opening and closing the soft top start leaking and do not work properly anymore. The leak occurs when the installed o-rings, rod seals and piston seals wear out to a point that they are not able to withstand the pressure inside the hydraulic cylinder anymore. This is especially noticeable during the summer in warmer regions since the original materials are limited in terms of temperature resistance.
What others offer: Most competitors source cheap, low-quality polyurethane rod seals (usually green or blue) from China, most of which are even lower-grade than the original rod seals which were already limited in terms of service life and heat resistance.
Our solution: We wanted more than just a simple and cheap replacement but a solution that incorporated unparalleled longevity and durability. Therefore we developed two kinds of rod seals made from high-tech materials: High-Performance Polyurethane (HPU, red color) as well as heat and wear resistant Viton® (FPM/FKM, brown color). HPU combines excellent mechanical properties with high chemical resistance, exceeding those of standard Polyurethane. Additionally, Viton® has a far greater temperature resistance (from -20°C/-4°F to +204°C/+400°F) and is therefore the preferred material for vehicles in warmer regions. The rod seals and piston seals are CNC-milled to our specifications within tolerance class DIN ISO 2768-1-f (fine) in Germany to ensure a high level of accuracy.
Seal types: A hydraulic cylinder contains a rod seal, an o-ring (depending on the model, not always installed) and a one- or two-piece piston seal. If the hydraulic cylinder is leaking, you'll need to replace the rod seal (and the o-ring). If the hydraulic cylinder is not able to open and close the soft top properly anymore, you'll need to replace the piston seal.
Attention: Although the seals we offer have a high temperature range, they may only be used with the following types of hydraulic fluid to ensure smooth operation and a long service life:
- Genuine Mercedes Benz hydraulic fluid MB 343.0, hydraulic fluids in accordance with standard DIN 51 524, HLP 32 or standard ISO 11158, HM 32
MJ Products LLC - Automotive seal and repair kits
Founded in 2014, we have been offering high-grade automotive seal and repair kits for car components whose inner parts tend to wear out quickly and force customers to replace the entire component instead of just the worn out part itself. Working with retailers and repair shops as well as using our own online shop, we were able to provide more than 30,000 customers all around the world with our products. We work exclusively with our trusted suppliers and manufacturers in order to guarantee high quality and a long service life and have all of our custom seals manufactured in Germany.
We have always been focusing on high-quality, long lasting products. We achieve this by using high-tech materials such as Viton®, PTFE (with special additives) and HPU (High-Performance Polyurethane) that are custom tailored to the individual application as well as by specifiying finer tolerances for CNC produced seals than what most companies work with. For especially durable tools and parts we primarily use 1.4404 (316L) or heat-treated 1.4112 (440B) stainless steel. We subject every new product that we devise and develop to extensive testing before selling it to our customers. We strive to far exceed OEM materials and specifications whenever possible.