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  1. 1990 500SL, Roof works but won't latch at front on closing

    R129 SL-Class
    FATHERTIME, thanks for confirming that it happens after taking off the hard top. If only we would remember to pull that button long enough until the rear locks are open all the way. It has happened to me, too... :wink Klaus www.tophydraulics.com
  2. 1990 500SL, Roof works but won't latch at front on closing

    R129 SL-Class
    Powergreen's '94 likely has the old-style, long release levers on the rear locks. The spring you are mentioning in the rear locks does not dislodge itself, but it can get dislodged when people are sticking tools into the rear locks where the spring is located. I have seen it happening only on...
  3. 1990 500SL, Roof works but won't latch at front on closing

    R129 SL-Class
    The magnetic switch S84/4 is not expensive, and I would always recommend replacing it if it is damaged. Even if it works after you have managed to re-solder the leads on it, that fix might be short lived. Mercedes part number 1298211451. The part number is on the sensor housing, as well. Klaus
  4. 1990 500SL, Roof works but won't latch at front on closing

    R129 SL-Class
    S84/4 magnetic sensor and top alignment Folks, isn't this forum awesome? Swany has given us a great response by trying to combine Bob's reply and mine, and providing some pics. Allow me to give you more detail and hopefully help out a lot of future readers. Bob is rightfully pointing out...
  5. 1990 500SL, Roof works but won't latch at front on closing

    R129 SL-Class
    Powergreen, it sounds like you have several issues at the same time. Which model year was the wreckd car that the top came from? Sounds like the top is too tight for some reason, if it pops off the front with a noise as you describe. You are always unlocking the rear before unlocking the...
  6. 1996 bow extension micro switch p/n 1298205510 fix

    R129 SL-Class
    Hello Unavita, wow, that's an old thread - do I need to become active on the forum again? Please forgive me if I do not answer immediately to the next reply - I have a lot on my plate. Which model year is your R129, and what work has been done to the top recently? The symptoms for a bad micro...
  7. R129 Bow Extension Cylinder Hydraulic Lines

    R129 SL-Class
    Hello Alan, I see that you have a model year '94, which still has the distribution block for the bow extension cylinder hoses behind the door jamb. It is hard to read the small numbers punched on the brass colored retaining plates on the distribution block, but they are actually punched on...
  8. Top Controller Issues / BBA Reman

    R129 SL-Class
    unwanted roll bar deployment in a 1993 SL500 Hello James, On a '93, the roll bar deployment is controlled by a separate controller (used in model years '90-'94). In early model years like yours, there is a sensor/switch that checks whether the rear axle is far away from the chassis (supposed...
  9. Top Controller Issues / BBA Reman

    R129 SL-Class
    I used to be very upset with BBA years ago, when there were lots of inconsistencies, and I ended up spending a lot of time on the phone with customers who had their controllers worked on, but the tops still didn't work. The lifetime warranty and money-back guarantee make a big difference, and I...
  10. need help on a 06 clk 350 hydraulic system

    C209/A209 CLK-Class
    LOL! The wrong fluid can mess up your system. Most fluids have additives that will suspend water, while convertible top hydraulic fluid does not. When the top moves, the fluid level in the pump's reservoir changes. As a result, outside air eventually makes its way into the reservoir. That...
  11. need help on a 06 clk 350 hydraulic system

    C209/A209 CLK-Class
    Thanks for asking. These fluids are not compatible. FeBi 02615 is identical to the Mercedes top fluid 000989910310. You could also use Pentosin CHF-11S, as it is more easily available in local car part stores, but there is a significant disadvantage: CHF-11S has quite an odor to it, so your car...
  12. Vario Roof failures and Repair

    R230 SL-Class
    Testing the vario roof locking cylinders for internal bypass Okay, I will talk about internal bypasses on the vario roof lock cylinders below, as opposed to external leaks where you have fluid escaping the system. As I mentioned before, four of the vario roof cylinders always get pressurized...
  13. 1990 500SL, Roof works but won't latch at front on closing

    R129 SL-Class
    Bob is right on. 120 bar will still move most tops, unless they have minor bypasses in one of the locking cylinders. With major bypasses, even 200 bar will not be enough. Factory setting is less than 200 bar, but it wouldn't hurt having that much pressure. R129 pumps are high quality gear...
  14. 2003 clk320 softop questionazfazcs

    C208/A208 CLK-Class
    Soft top controller p/n 2088201126 vs 2088003026 The hydraulic system was changed with model year 2001. The cut-off are the last six digits of the VIN 070017. Early models use the controller/ECU p/n A208-820-11-26, and later models use the controller p/n A208-820-30-26. They are not...
  15. Windows ,locks, trunk and convertible top

    C208/A208 CLK-Class
    Try the blade key on the trunk lock. It can take a bunch of wiggling, and you may have to spray some WD-40 into the lock first, to loosen up the tumbler pins. Keep pushing n the blade key and wiggle until the lock turns. Turn almost a quarter turn and open the trunk lock while keeping the key...
  16. 209 top goes down but not up

    C209/A209 CLK-Class
    Honestly, I didn't realize before that the top latches in the front only after the rear bow is up. In hindsight, it makes perfect sense. Good thing there was a video attached to the original post... Looking forward to Joseph Helphinstine's update, and hopefully some photos. Klaus
  17. Soft top issues with repaired Top control module

    R129 SL-Class
    The release solenoid is near the top of the right side roll bar support, towards the rear. The RST (roadster soft top) controller checks whether the solenoid's electrical resistance is correct, because it is a safety device. The most common reason for it throwing a release solenoid fault code is...
  18. Soft Top Issue (long)

    R129 SL-Class
    Lessons learned: magnetic sensor, work on the hydraulic system only once, etc... Hello Stutz, thanks for sharing, thanks for the kind words, and thanks for reporting in such detail! All is well that ends well. I have actually damaged the magnetic sensor on my '97 myself, when I was in a...
  19. Top not moving after the rollbar ratcheted up - problem solved

    R129 SL-Class
    I hadn't heard of the symptoms on this one before, so I thought I'd share it with the forum. Fortunately, this turned out to be an easy fix. It happened on my '97 SL320. Symptoms: tried to raise the roll bar, and it comes up with a loud, ratcheting noise. Once the roll bar is all the way up, I...
  20. 209 top goes down but not up

    C209/A209 CLK-Class
    Adjustment after top lock cylinder replacement I'm glad there was a video attached to the first post. Did you notice how the top latching in the front was the last step after the rear bow came up? I suspect that the "front latched" signal is not getting to the controller. When the front lock...
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