Need a manual on Kitchen AidArtisan espresso machine KPES100PM, that I can print out Lars

You can use the machine forever like that, the black hose is a return hose, it's there so water can return to the tank without you hearing it dribbling into the tank. The clear hose is the pickup hose.

Hi I have posted a service manual and a parts list here

https://rapidshare.com/files/655646388/kitenaid_service_manual_5KES100.pdf

https://rapidshare.com/files/2923830445/Kitchenaid_5KES100_Repair_Part_List_-_8212198.pdf

It sounds like the boiler element or maybe the thermostat. You have to take the top part of the machine off to get a good look at the water boiler.
I have uploaded a not very good strip guide that I got from the internet, I have used it but it makes thing overly complicated to my mind, but here it is anyway.
https://rapidshare.com/files/3189994876/KES100_strip_guide.zip

It has written instruction that relate to two diagrams in the PDF.

If you mean the switch will not lock on then replace the switch and check for steam boiler leaks while you are there. Steam is the cause of most switch failures in this model.

Hi I have brought parts for mine from a place in Germany they are happy to ship to the UK but the shipping is quite expensive they have the 3 way solenoid for 51 euros on their website.

here is a link at mediafire.com to a pdf of the web address as it has non English letters this website will not allow me to post it directly also a link to the parts list I posted on rapidshares.com

http://www.mediafire.com/?6utm0xi5wypcqhr

https://rapidshare.com/files/2923830445/Kitchenaid_5KES100_Repair_Part_List_-_8212198.pdf

Push the center top of the water tank in as far as you can without breaking it. Do this each time you refill.

Remove the filter grille with the single cross head screw in the middle, then undo the 2x allen head screws now exposed. It may require some sideways levering with a large screwdriver once the allen screws are out to move the aluminium puck. You really do need to get it out to clean the puck up. Make sure the 4 holes thru the puck are cleaned out properly with a drill and buff all surfaces up with a wire brush. Remove the old brew head seal and clean up where the puck came from then refit the puck and push the new seal into place.

Not a solution but a note. Kitchenaid got sold off to whirlpool and they almost immediately discontinued this model. I had two of them with the same issue, that of leakinghigh pressure lines. I can't even find an appliance repair facility that will touch this model because they can't get repair parts. Spent a lot of money on two espresso machines that don't work.

Yes, replace the gasket and see to it that it doesn't
leak.

While I am familiar with Kitchenaid espresso makers, I am not familiar with this problem. I would suggest calling Kitchenaid Customer Service, as you will have options under your Pro Line warranty. Their toll-free telephone number is:

1.800.541.6390.

by frother you mean it puts out steam ? if yes then I need to know how long you hold down the button and have you checked the hose in back to see if it has cracks or is kinked?