Grohe dual-flush toilet panel?

I have the following panel and wondering if anyone can help me.

http://www.plumbcenter.co.uk/en/plumbing/commercial-plumbing/concealed-cisterns-frames/grohe-skate-air-38506-wc-wall-plate-chrome-plated-69295

Recently I can hear the sound of dripping water behind the flush buttons. I don't see any water leaking in the pan. On flushing the dripping sound disappears. I don't think it's the sound of the cistern filling up because when I wake up in the morning (ie. a good 6 hours since the toilet was used I hear the dripping) can't pin-point how long it takes for the dripping sound to start occurring.

Maybe I need to monitor it more actively but on a small flush this morning before work I still didn't hear anything after 1 hour.

1 - How do you remove the panel as I'm scared I break it?

2 - I live in a flat. Is there a danger if I left it the water will leak to downstairs?

3 - Any ideas what the problem could be?

Also the housebuilder has tiled everything with no panels. I hope you can fix it from the panel otherwise tiles needs to be broken and I have to find the same ones which is going to be difficult.

Found the instructions but don't really understand them.

http://www.showerspareparts.com/downloads/grohe_dual_flush_dual_hose_push_button_horizontal_ 42305_000.pdf

Are the panel buttons connected to all the pipes? Hmm... can anyone help what I can do to diagnose the problem? I don't want to call a professional in not knowing what I be paying.

I found the problem. I opened the panel and found this metal flexible tube leaking at the joint. Not sure what it is called but I couldn't tighten it. Quite difficult to get a grip as the opening isn't that big. Any ideas? Is it just a matter of tightening or a washer of some sort needs replacing?

What kind of joint is it? If tightening works then great, if not maybe a new washer, or O ring is needed. Do you have a shut off valve just for this line?

Try using a properly sized box or open end wrench...that is the correct tool for the job. If tightening doesn't fix the issue, contact a local plumbing supply store and see if they are an authorized grohe distributer. If they are an authorized dealer, they should be able to order the part in pretty quick off.

Good luck!

Mark

Thank you for the answers. I managed to upload a photo of the dripping pipe. What is it called? Is it feeding cold water to the tank? Unlike the old style toilet there isn't a shut off value on the floor.

View image: photo (2) (http://postimg.org/image/mw7gwa4c1/)

I was using an adjustable spanner and I couldn't get it to grip the nut that firmly so I only managed to slow down the dripping a little . I assume these are standard pipes, any ideas what size spanner I need?

Does tightened affect the flush? I ask because suddenly the flush is no longer working properly. A little water comes out and then stops. However, I can see more water in the cistern.

Sorry for all the questions but I appreciate your answers.

Hi massplumber2008, can you recommend me a reasonably priced sized box on Amazon.co.uk?

Thanks

Thanks everyone for the answers. I found out Grohe products have a 5 year warranty period and hence they have ordered a new connection water pipe and drop valve.