SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: Hard Top Locked Adjar

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Old 12-15-2020, 02:11 PM
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Hard Top Locked Adjar

I messed up the sequence of installing the hard too.

I managed to lock the front connection points (1) ... before setting the locating point (2) and rear attachment points (1).

Now the front will not release.

When doing this I did not have ignition on 2 or the doors open. Although I did turn the ignition on to attempt to lock things down ... when the front locked.

Now the front will not release.

How to release??




Got flustered and did not seat the back properly before locking down ... the front locked & now will not release.

Old 12-15-2020, 03:17 PM
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My independent mechanic figures it is a matter of engaging the top up switch ... then jiggling and tugging it loose.

He figures it is not sophisticated logic ... mechanical things driven by hydraulics.

I willl be driving over soon to get a hand.

I hope he is right.

Old 12-15-2020, 07:36 PM
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Can you try to release the top manually with the MB tool?
Old 12-16-2020, 01:46 AM
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Originally Posted by TX Benz Driver
Can you try to release the top manually with the MB tool?
I called the local MB Service Manager - that is what he recommended.
Have not tried yet - too busy moving houses today.
Old 12-16-2020, 10:21 AM
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The reason it isn't sitting square is because the windows were up when you lowered the top onto the car. Don't ever do that again.

Support the rear of the hard top BEFORE lowering the windows. When the windows lower, the rear hard top inserts will want to move into position probably taking big gouges out of the tonneau deck. Lower the windows.

Flip down both visors and pull the 2 plugs (CAREFULLY) from the header to access the front release points. With a regular 6 mm (or 5 mm, somewhere around there) Allen wrench socket, turn the header lock points to release the front edge of the hard top. I think there are 2 "clicks" to release. Turn the first top release lock to the first click and then move to the second lock and turn it to the first click as well. Go back to the first lock and fully open the lock, then go the the second lock and do the same.

The hard top should now be unlatched.

Last edited by mahunt; 12-16-2020 at 10:24 AM.
Old 12-16-2020, 03:19 PM
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Thanks Mahunt.

Good point about supporting the back while unlatching the front.

Also a very good instruction on manual release...

I have installed the hardtop many times over 18 years of ownership .... but we were moving house yesterday, asked a moving company laborer to help. I tried to do this from memory & I got all flustered in the process.

I will definitely re-read the manual each time I do the mounting in the future.

Believe

Last edited by ChrisB; 12-16-2020 at 04:19 PM.
Old 12-16-2020, 04:41 PM
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The passengers side opened on two clicks.
The drivers side was very tight and eventually popped and now spins freely in both directions - not releasing.

Any suggestions.
Old 12-16-2020, 04:50 PM
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The passengers side opened on two clicks.
The drivers side was very tight and eventually popped and now spins freely in both directions - not releasing.

Any suggestions.
Old 12-16-2020, 10:30 PM
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My car is 1999 - if that makes any difference.
Apparently the top release got more complex in about 1994.

Are the (2) manual release mechanisms handed (threaded) opposite one side of the car to the other?

On the passenger side “left” did loosen and with (2) clicks the mechanism released & lifted.

With the drivers side “left” did not release (after the first click on the passenger side) and with enough manual torque led to the mechanism breaking. Then freely spinning left or right.

Even if we were to get the locked mechanism to release by working on the hydraulics ... without replacing the broken part ... if the hydraulics ever malfunctioned - then the top would be permanently locked ... with no ability to open manually or hydraulically.

The remedy now is to replace the broken mechanism ... new part = $ 1,400 supply only.

Take care to not mess up like me.

Last edited by ChrisB; 12-16-2020 at 10:45 PM.
Old 12-16-2020, 11:05 PM
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I've replaced my header cylinders twice now, the first time 12 years ago with MB; the second time last year with rebuilds from TH.

Short of rounding out the Allen head receiver end of the locks, I don't see how you broke the header lock mechanism. The R129 has a few faults, but breakable hard top header locks isn't one of them. The lock mechanisms are STOUT. I can't imagine the amount of torque one would have to apply to snap off the mechanism BEFORE rounding out the Allen receiver. Impressive.

As for another lock mechanism, call Klaus at TH and he should be able to put you on the path to a replacement.

How are you going to get the balky lock to fully release the top?

Old 12-16-2020, 11:52 PM
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“As for another lock mechanism, call Klaus at TH and he should be able to put you on the path to a replacement.” ... not as easy I live in Canada.

“How are you going to get the balky lock to fully release the top?” ... I have no idea - will ask the mechanic.

Not really happy about going down a Rabbit hole starting at $ 1,400 supply cost.
Old 12-17-2020, 08:49 AM
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Lucky you, TH does international business. Klaus may also know how to pop that last lock, give him a call.

Per his website:

ATTENTION INTERNATIONAL CUSTOMERS

For Customs Duties and Taxes, you must declare a value on your package. Please Note: Top Hydraulics Inc, will not accept United Stated Customs and Duties charges on packages with declared value over 200 US dollars. You must ship "free domicile", meaning you as the sender agree to accept responsibility for all Customs duties, broker fees, and taxes. On packages with values declared over 200 US dollars, we are typically charged an Entry Prep Fee (currently about $25) plus 2.5% tax on the declared value of the package, there are oftentimes delays in customs, and it can take a while for us to receive the actual customs invoice.
Old 12-17-2020, 09:59 PM
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Yes the mechanism is broken - I managed to twist it off by turning left rather than right on the drivers side.

Where the screw driver is pointing ... is where the mechanism was damaged by me turning the wrong way.


I hope you never have to look at this.

The mechanic had (2) helpers put force down into the rear attachment points .... which tricked the systems into thinking everything was OK.

Then the hydraulics released the front lockdowns.

I wish he had done.(2) things yesterday:
1) Advise me not to pull so hard on the manual release ... try the other way - in case it was reverse thread (which it is).
2) Thought of the pressure needed to trick the hydraulics into working

I have been just trying to do everything in too much of a rush ... has not paid off these past few days.

Last edited by ChrisB; 12-17-2020 at 10:15 PM.
Old 12-17-2020, 11:04 PM
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Truly a cautionary tale.
Old 12-18-2020, 08:06 PM
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So do you need to replace the whole unit now?
Old 12-18-2020, 09:57 PM
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Originally Posted by mulladp
So do you need to replace the whole unit now?
Yes the hydraulic lock down / release on the drivers side. I now have the worlds most expensive paper weight.

There is no easy way to rebuild the unit which contains the one broken part.

With labour - just under $ 2,000 CDN.

By the way - apparently the rear drivers side attachment point has the micro switch that when holding a load ... tells all the other hydraulics that it is OK to function.

I wish we had thought of / or known that before doing the right and left (opposite) handed manual release.
Old 12-18-2020, 11:57 PM
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That still had to take what seemed like an inordinate amount of force to break. You can now see how beefy the lock mechanism is built.

Have you called Klaus yet?

There is no reason to spend 2K of anything to repair one lock. The lock itself is held in with the 2 Torx bolts that you see before you. After you disengage both oil lines, the entire lock comes out.

Call Klaus and save yourself some time and money.
Old 12-19-2020, 11:17 AM
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Do you just need the bracket that is screwed into the windshield that holds the cylinder?
If so I have and extra
Old 12-19-2020, 09:04 PM
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Part was the most expensive $ 1,400 from Toronto.
$ 300 labor ( what 5 hours farting around) + taxes.

It’s done and she is back home ready to go.

The whole issue was a series of hurried events that did not need to happen as they did.

Slow down and think things through is the lesson.

A moving household weeks is not conducive to that - for me.

Thanks for your help ...

Hopefully some one will search & find this in the future. And save themselves some strife.
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