Question about 1991 Mercedes-Benz Mercedes Benz Sl Class

9 Answers

Soft roof does not open

Although my car has been served home in Finland and all measurements show that it is allright the soft roof compartment will not open nor will the safety bar rise. We have used the power from another car running but yet the red light is flicking and nothing happens.

Please help me get my cab back in use. I wuold be forever greatful.

With kind regards
Rino Morgenstern
email:viveka.morgenstern@kotikone.fi

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  • 3 more comments 
  • vivekamorge Jul 12, 2008

    Thank you very much for your answer but the problem is that nothing regarded the roofs is working by electricity though all measurements made at car service show there is nothing wrong with the system and they were not able to help us there.

    With kind regards
    Rino Morgenstern

  • vivekamorge Jul 14, 2008

    Thank you very much for your answer! If I lift the roof manually will it then start working by electricity? Because all measurements made at car service show there is nothing wrong with the system and they were not able to help us there. I just do not understand what to do. With kind regards
    Rino Morgenstern

  • vivekamorge Jul 20, 2008

    The soft roof is in its storage and will not rise automatically. A clicking sound occures and nothing else happens when I push the red light button.
    Yours Rino Morgenstern

  • vivekamorge Jul 21, 2008

    All measurements show there is nothing wrong with the connections.
    Yours
    Rino Morgenstern

  • vivekamorge Jul 22, 2008

    I did not quite understand the last solution. What is a "trunk lid" and where is it located?
    Regards Rino

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Find the two plastic caps sitting behind the sun visor on either side of the car. Gently prise them out, be careful as years of sun may have made them brittle. Behind the caps you should see a hexagonal head that the manual roof tool fits into (failing that use an allen key). Turning these hex heads will unlock the front soft top locks. (can't recall if it was clockwise or anti-clockwise, so be careful!). I found that you need to start one side, then unlock the other side, then come back to the first side and finish the job off. At this stage you should be able to lift the top up slightly to see it's no longer engaged in the front locks. Now move to the boot.

In the back of the boot you should see two small pieces of the trim that will lift out. These will be located on each side near the boot hinge mechanisms. Lift the trim peices out and you should see a lever (mine is made from cad plated something or other, ie it's a gold colour) and it will have red paint on it.

Fit the spanner/wrench end of the manual roof tool, or otherwise a 10mm open ended spanner, onto the small nut welded into the end of that red lever. I started on the left side(passenger side), levering gently down will unlock, and gently up will lock). You may need to alternate between each side, undoing a little and then swapping. NOTE: I found the levers won't budge unless the soft or hard top 'pins' are physically sitting in the lock holes. Don't force the levers as they should move quite easily.

Now that you have both the front and back locks undone, the last part is to unlock the tonneau or rear deck (soft top roof compartment). To do this you need the 10mm spanner/wrench again. You will find two hex heads tucked down in between the roll bar and the side of the interior trim (about 6-8 inches from the door frames), fit the spanner onto the head and turn until the tonneau cover releases. You should now be able to fold the soft top down by first raising the rear section of the soft top until the back lip is pointing to the sky, then lift the front section along with the rear section down into the compartment. I guess getting it back out is a reverse of the procedure above. Hoepfully I've got it all right as I've done it from memory.

Posted on Jul 12, 2008

  • alberto anicolas Aug 19, 2013

    thank you so much,I just closed my soft top following your instructions. I wish I could had taken pictures of every step/every item as I closed the top to show others but I couldn't. Wow!!!....you're terrific!!!,thanx again. Alberto

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A part of the mechinical components that operate the foor is sticking, have some one try to open it whilc you examine and see there this clicking sound(something slipping) is comping from, more than likely is a gear or a component that turns or wroks with motion.

Posted on Jul 22, 2008

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If you have read all of the Soft top threads, have you readthe fault codes associated with soft top issues with the flashing soft topswitch mounted on the centre console? if so what error codes are indicated onyour vehicle?

Usually if the hydraulic reservoir under the spare wheel is up to level and nosign of any leaks, hydraulics are normally not the issue.

Run the soft top cycle again and when it fails, count the flashes from the softtop switch on the centre console and check against the DTC codes in the softtop stickys. there is an easy way to renew the hydraulic fluid but I don'tthink that this is your problem and the system purges itself of any air thatmight get in it.

You mentioned that the car sat for two years. Is there a possibility that thebattery could be low even after a recharge? You may want to try your top withthe car outside and the engine running.
You didn't mention anything about your side windows. Are they both in the fulldown position when you are trying to raise or lower? They must be down.

Please reread the MY90-95 threads at the bottom of http://www.benzworld.org/forums/r129...te-thread.html
click below for more information;
|Removal & Installation of Hydraulic Cylinder For SoftTop Bow limitswitch for mercedes soft roof
hope this may help;

Good luck and thank you for using Fixya;

Posted on Jul 21, 2008

  • LORETO LACARON
    LORETO LACARON Jul 21, 2008

    When clearing the codes on the top controller, be sure to clear the
    codes at least twice. Just keep going through the clear/erase sequence
    over and over until you are down to one flash. One flash = OK. That's
    just the way it works.





    Roll Bar Codes and Reset Procedure.



    To recover: Short pin 7 to ground (Pin 1) with LED + to pin 16 (+12V)



    Code 1 = No faults in system.

    Code 2 = Roll Bar Control Unit

    Code 3 = Voltage Supply

    Code 4 = Driver Seat Belt Lock Relay (K18/2) open or short circuit to terminal 30 and/or 31

    Code 5 = Passenger Seat Belt Lock Relay (K18/3) open or short circuit to terminal 30 and/or 31

    Code 6 = Roll Bar Deployment Solenoid (Y57/1) open or short circuit to terminal 30 and/or 31

    Code 7 = Left and/or right rear axle switch open or short circuit to terminal 30 and/or 31

    Code 8 = Roll Bar Warning Lamp

    Code 9 = Roll Bar Warning Lamp and/or impulse counter held too long to erase malfunctions

    Code 10 = SRS Control Unit







    Mercedes Soft Top Controller Reset Procedure.



    At diagnostic connector (under the plastic cover at the hood-up switch) on

    the passenger side near strut mount.



    To recover codes for the soft top controller:



    Connect shorting switch between pin 1 and pin 10



    Short 2 to 4 seconds to read error code.

    Lamp in top switch will flash out a number of pulses.



    Short 6 to 8 seconds to erase error code.



    Some codes must be read twice before they will erase.





    The codes that will suspend operation of a soft top on the early R129 are 21, 22, 26, and 30.



    A code of "1" indicates no faults and no hard top in place, while a
    code of "20" indicates no faults and the hard top is assumed to be on
    the car.



    3.= Limit switch, right locked ,soft top storage compartment cover.

    4 = left compartment cover closed switch

    5 = right compartment cover closed switch

    6.= left front latch switch.



    10.= left rear latch switch.

    11.= right front latch switch.



    16 = roll bar retracted switch

    17 = Left window failed to lower (limit switch open)

    18.= Right window failed to lower (limit switch open).



    20 = Hard top installed, no faults.



    23 = roll bar control unit not functioning.



    25.= contradicting inputs.



    27 = insufficient voltage

    28.= Speedometer signal is missing.

    29.= Wheel speed from ABS control module missing.

    30 = Top operation disabled (due to #29).

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Hi,

Your post indicates extensive checks on the electrical components and turned out all check outs, could it be possible that there is another component, a hydraulic one? If yes, perhaps you need to check on the hydraulic pump to check if it they are active. Likewise a check on the fluid level would be in order. Design wise, hydraulic pumps for this purpose would be pretty near their load (in your case the softroof) and therefore would be at the trunk (boot). It would be very close to the end of the metal frame that moves the softroof, perhaps hidden by a cover (for aesthetic reasons).

Additionally, pls check the windows, as I was made to understand that they have to be lowered down before the softroof will initiate movement. Further same windows activate/trigger a sensor/switch that enables/disabes softroof deployment. Just curious, was the car just washed prior to the occurrence of the problem? If yes, you may want to check for corrosion on the switches/terminals/electrical contacts of this switch.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jul 21, 2008

  • Louie  Role
    Louie Role Jul 21, 2008

    Hi again,

    It would be relatively easy to determine if the hydraulic pumps are working, pressing on the switch should activate this pump and could be felt on the body of the car especially at the rear. If the pump is working and the fluid checks out, you may have to do a pressure test and check/release trapped airbubbles (if present) in the system lines.


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Http://www.bba-reman.com/catalogue/Products.aspx?category=633

Posted on Jul 20, 2008

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A roof is opened and closed by utilizing a trunk lid for opening and closing a trunk room. The trunk lid can be raised and lowered while it is held substantially horizontal. The trunk lid is provided with a roof slide unit for moving the roof in longitudinal directions. When opening the roof in a closed state, the trunk lid is raised to a position behind the roof, and the roof is moved rearwardly by the roof slide unit to be supported by the trunk lid. Then, the trunk lid is lowered down to a position to close the trunk room. This brings an end to an operation of opening the roof. A reverse procedure may be taken for closing the roof.

Posted on Jul 14, 2008

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Test the rooftop lifting motor, check with a tester if power is getting to the motor. If the motor get voltage in contacts, then the motor is faulty, replace it.
If there is no power to motor, then simply rebuild the circuit from switch to fuse or from fuse to motor, testing in what part is the problem (test if you get power in fuse contacts).
use a car Circuit Tester

Posted on Jul 14, 2008

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Find the two plastic caps sitting behind the sun visor on either side of the car. Gently prise them out, be careful as years of sun may have made them brittle. Behind the caps you should see a hexagonal head that the manual roof tool fits into (failing that use an allen key). Turning these hex heads will unlock the front soft top locks. (can't recall if it was clockwise or anti-clockwise, so be careful!). I found that you need to start one side, then unlock the other side, then come back to the first side and finish the job off. At this stage you should be able to lift the top up slightly to see it's no longer engaged in the front locks. Now move to the boot.

In the back of the boot you should see two small pieces of the trim that will lift out. These will be located on each side near the boot hinge mechanisms. Lift the trim peices out and you should see a lever (mine is made from cad plated something or other, ie it's a gold colour) and it will have red paint on it.

Fit the spanner/wrench end of the manual roof tool, or otherwise a 10mm open ended spanner, onto the small nut welded into the end of that red lever. I started on the left side(passenger side), levering gently down will unlock, and gently up will lock). You may need to alternate between each side, undoing a little and then swapping. NOTE: I found the levers won't budge unless the soft or hard top 'pins' are physically sitting in the lock holes. Don't force the levers as they should move quite easily.

Now that you have both the front and back locks undone, the last part is to unlock the tonneau or rear deck (soft top roof compartment). To do this you need the 10mm spanner/wrench again. You will find two hex heads tucked down in between the roll bar and the side of the interior trim (about 6-8 inches from the door frames), fit the spanner onto the head and turn until the tonneau cover releases. You should now be able to fold the soft top down by first raising the rear section of the soft top until the back lip is pointing to the sky, then lift the front section along with the rear section down into the compartment.

Hope that helps.....

Posted on Jul 12, 2008

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Dear Sir/madam,

Follow the below steps......

Find the two plastic caps sitting behind the sun visor on either side of the car. Gently prise them out, be careful as years of sun may have made them brittle. Behind the caps you should see a hexagonal head that the manual roof tool fits into (failing that use an allen key). Turning these hex heads will unlock the front soft top locks. (can't recall if it was clockwise or anti-clockwise, so be careful!). I found that you need to start one side, then unlock the other side, then come back to the first side and finish the job off. At this stage you should be able to lift the top up slightly to see it's no longer engaged in the front locks. Now move to the boot.

In the back of the boot you should see two small pieces of the trim that will lift out. These will be located on each side near the boot hinge mechanisms. Lift the trim peices out and you should see a lever (mine is made from cad plated something or other, ie it's a gold colour) and it will have red paint on it.

Fit the spanner/wrench end of the manual roof tool, or otherwise a 10mm open ended spanner, onto the small nut welded into the end of that red lever. I started on the left side(passenger side), levering gently down will unlock, and gently up will lock). You may need to alternate between each side, undoing a little and then swapping. NOTE: I found the levers won't budge unless the soft or hard top 'pins' are physically sitting in the lock holes. Don't force the levers as they should move quite easily.

Now that you have both the front and back locks undone, the last part is to unlock the tonneau or rear deck (soft top roof compartment). To do this you need the 10mm spanner/wrench again. You will find two hex heads tucked down in between the roll bar and the side of the interior trim (about 6-8 inches from the door frames), fit the spanner onto the head and turn until the tonneau cover releases. You should now be able to fold the soft top down by first raising the rear section of the soft top until the back lip is pointing to the sky, then lift the front section along with the rear section down into the compartment. I guess getting it back out is a reverse of the procedure above. Hoepfully I've got it all right as I've done it from memory.


Thanks
Good Luck


Don't forget to rate the solution

Posted on Jul 12, 2008

  • Asfiya Ahamed
    Asfiya Ahamed Jul 20, 2008

    Sir,

    The left and right side latches for the seat back each have a
    microswitch to verify that the seat back is in position for safety,
    since the seat belt is integrated into the back. If your light in the
    cluster is on, then one of these switches is probably not closed.


    The soft top will not complete an opening or closing operation unless
    both windows are lowered. Since your passenger door is missing
    components, then the soft top controller is not receiving this needed
    input.

    Still the problem is not fix means go through the authorized centre for help. They only fix it. I think the problem is not solved by done manually. Better to go service centre for help.

    Thanks
    Good luck


    D'ont forget to rate the solution


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