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Audi A4 Convertible/Cabriolet roof problem and possible solution

NickRB Jun 26, 2012

  1. NickRB

    NickRB New Member

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    Hi,

    I recently had a problem with the roof slowing down and eventually stopping on my A4 Convertible. I consulted the forum and came across an excellent article from Krumz in relation to cleaning the hood motor. Link to the article as below:

    http://www.audi-sport.net/vb/audi-s...et-soft-top-roof-hood-motor-repair-guide.html

    I followed this article and did exactly as described but unfortunately this did not cure the problem. In the article was a link to a chap on Ebay who rebuilds motors so I got in touch with him as he was fairly local to me. Link below:

    Audi A4 Cabriolet Roof Motor Repair (Power-Packer) | eBay

    In short while the A4 was in to the local main Audi dealer (York) for a cambelt change I asked them to diagnose the hood fault and was told I needed a new pump which would be £1200 plus!

    When speaking to Mervyn (Ebay chap) I described the symptoms of the hood not working and he immediately confirmed it was a motor fault as the original brushes fitted to the motor are of poor quality. He also advised that rarely do the pumps fail and that he had reconditioned hundreds of motors.

    I visited Mervyn and within half an hour he had cleaned the bushes up and confirmed the motor was working fine. This did the trick but the hood still struggled which was down to the pump not having enough hydraulic oil in the reservoir. Topped up the oil and the hood now works perfectly.

    The article from Krumz was spot on and very comprehensive. Mervyn is very helpful and his contact number is in the link. He does a very quick mail order service for your motor as described in the link.

    Overall this solution cost me £30 for Mervyn to clean the motor (I had already removed the trim to gain access) and £8 for a bottle of hydraulic fluid from Audi. Total £38 as opposed to £1200 plus from Audi!!!

    Do not have faith in main dealers, they mis-timed the new cam belt when fitted and the car had to go back to be set up properly and on a health check they completely misssed a tyre that was illegal on the inside despite them stating it had 5mm!

    Hope this post helps as the links saved me a fortune.

    Thanks again to the forum, Krumz and Mervyn

    Cheers

    Nick[​IMG]
     
    JLBmatic likes this.
  2. bowen

    bowen Member

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    Thanks for this, very useful!
     
  3. rjm180

    rjm180 Active Member

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    Very useful info indeed. Many Thanks and good to hear of a nice result. Any pics of your cab?
     
  4. turkonboard

    turkonboard New Member

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    Brilliant brilliant brilliant!
     
  5. jkmb

    jkmb New Member

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    Thanks for this. I had a similar fault, removed the pump motor and sent it off to Mervyn at Autoelectron (very helpful over the phone as well), received it back a couple of days later and happy to say all working fine now.

    So, thanks for this post, thanks to Mervyn and hope this helps anyone else.

    If you think you may have the similar fault, check out:
    J
     
  6. abstein

    abstein New Member

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    Sorry to bump up an old thread, but I am having the exact same problem described here with my 2009 A4 Cabriolet. As much as I would love to visit Mervyn in Yorkshire, I am located in Los Angeles, California.

    Has anyone heard of anyone who does this repair in California? I wrote to Mervyn too... Any advice is much appreciated.
     
  7. leegsi

    leegsi Active Member

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    I think there is a guy on here that will sell the brushes to you so you can strip the motor down.

    There is a big thread about it.
     
  8. VagPro

    VagPro Active Member

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    Hi all,

    yes I have finally managed to reverse engineer the brushes and carriers and a kit is available on eBay.
     
  9. leegsi

    leegsi Active Member

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    Any links?
     
  10. Ovid

    Ovid Active Member

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    Any good electric motor company sells them for pennies.
     
  11. VagPro

    VagPro Active Member

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  12. Samuel1993

    Samuel1993 New Member

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    I had a problem with my Audi A4 Convertible roof with only the front opening a few inches then stopping there. I tried over and over and it kept getting stuck in the same position. I thought there was a problem with the hydraulic motor that functions the roof. Therefore looked on YouTube to find someone who had the same issue and resolved it by taking out the motor and cleaning the brass brushes inside of it.
    I went to the effort of doing this which all in all took me around about an hour to do.
    I put it in back correctly after cleaning it all to find the problem still occurred. I then thought it could be the relays on the motor which weren't working properly.
    Before I tested the relays I found out from a friend that you can do a manual reset which could resolve the issue.
    To manually reset the roof you must open the fuse box to the side of the driver's side panel and take out the Red Roof Key. Then have your car key in the ignition and switched in the on position (not engine start position). Then put the Red Roof Key into the slot located on the interior roof behind the interior light switch, turn they Roof Key and the front of the roof will unlock. Step out the car and pull back the front of the roof and lift up the back (2 people required), you can then access the roof hatch where it stores, jump in the back of the car and pull out the middle compartment between the rear seats and inside there is another slot for the Roof Key above. Put the key in and turn until roof hatch unlocks and pops open, then open and pull the hatch back and place the roof inside. Once the roof is in, relock the hatch by putting the Roof Key inside the slot again and turning the opposite way. After this is done do this method I'm revers until the roof is back up and locked in position using the Roof Key locking from back to front. Once all locked the roof programming has been reset. Turn on the engine and operate roof switch and the roof should function normally.
    It completely surprised me that this worked as thought it would be down to some sort of mechanical problem costing hundreds. I had tried this method previously just to to try to see if would operate but I didn't put the car key in the ON POSITION (this is very important to reset the roof otherwise will not work. The whole procedure will only take 5 minutes and works wonders.
    Hope this helps anyone with a roof problem for their Audi A4 Convertible.
     

    Attached Files:

    Fender Man likes this.
  13. Fender Man

    Fender Man New Member

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    I have a 2007 A4 Convertible 2.0T.
    Great vehicle, but also the roof stopped working. Tried to use some of the tips above, none of which worked. Took my A4 to an independent repair shop. It took them an hour figuring that one of the roof sensors had failed. The roof has built in sensors that are there to determine the position of the roof in motion and to go to the next step of the fold and unfold motions. Once one of these sensors is kaput, it stops all together and the only resort you have is to close it manually with the special tool that is hidden away in the fuse box on the driver side end-panel of the dashboard.
    The instruction book explains in detail how and where to use this tool (a very strange working wrench, but effective once you figured it out.)
    Once the roof is then closed, the warning light on the dash keeps blinking and the very annoying alarm sounds every half minute or so as it thinks that the roof is not secured, even though you just closed it with the special tool. Before using this tool, make 100% sure you read and understood the instructions in your instruction book that came with the car.
    My mechanic called me today that he found that the sensor had fallen out of its position. He found it inside the roof, placed it back in its slot and Bingo, the roof worked again without any problem.
    A new sensor costs 200 dollars in Canada, plus another 100 bucks in labour to replace it. In this case, the whole exercise cost me $ 170,his time charges for the few hours he worked on it. Sure, Audi would have replaced the parts and the bill would easily ballooned to $ 500 + dollars.
    It pays to shop around for a good, honest mechanic. It can save hundreds. I am smiling today!
     

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