Mercedes R129 SL-Class.- Chapter 3 - Replacing the Tonneau Cover Lock Cylinders

Klaus of Top Hydraulics, Inc. walks you step-by-step through the process of replacing the Tonneau Cover Lock Cylinders with rebuilt and upgraded units.
Mercedes P/N: 129 800 0072
Note: Model years 1990-1996 used two Tonneau Cover Lock Cylinders. One on each side.
Model years 1997-2002 only used one Tonneau Lock Cylinder on the right (passenger) side
Order parts and find more helpful info on our website at www.tophydraulics.com

[@tedschroeders5289]

Excellent video! Precise, professional, and informative without any unnecessary fluff.

[@salvadorgranados5997]

Techo se ha quedado lnmobil no funciona que pued o haser para encontrar la falla saludos desde El Salvador ayúdenme por favor

[@raiderman28]

Very good explanation.. I love how easy you made it look.

[@jims2217]

excellent series! thank you

[@brentpetek8411]

Huge huge huge help... So grateful

[@jsanchez3791]

this is amazing

[@njoeandjen]

1991 300sl main lift cylinder that the top threads on not the snap ring style like my 96 do these use different seals and do you sell them thanks from Joe!

[@richardsimile5376]

Hi Klaus, Do you have a video on the removal and replacement of the Rear Lock cylinder? The one you referred to being in the wrong position. Both of mine started leaking BADLY at the same time for some odd reason. Looking from the trunk, I cannot see where the fluid is coming out of the rear top lock cylinder. The Tonneau cylinders are dry as a bone. 2002 SL500 with 55k miles. I would greatly appreciate any suggestions you may have. Thank you in advance !!! Richard Simile / 602-884-2111

[@alexp893]

Look at the "Chapter 4" video?

[@TopHydraulics]

Thanks for asking. These cylinders tend to fail in pairs, so there is no surprise in both rear lock cylinder 1298002172 leaking a lot. You have probably already replaced the front lock cylinders. Ultimately, all nine cylinders in the rear fail in short order once you have the first leak in the rear.
Here is our video on replacing the rear lock cylinder, bunched together with the video on replacing the tonneau cover lift cylinder: th-cam.com/video/srzJ0a4eNDk/w-d-xo.html

[@richardsimile5376]

@@TopHydraulics THANK YOU SO MUCH for your help !!! Chapter #4 is perfect in what I needed. I would like to know how much Top Hydraulics would charge me to rebuild the front top lock cylinders, the rear top lock cylinders and the Tonneau cylinders? Six cylinders total. Do you use MB seals? Thank you again for your awesome help !!!!