My old wiper motor died and I replaced it. Wiper works fine but I did not get the washer parts replaced properly. I have one part left :-( that looks like a small ratchet. Would anyone have a diagram showing the correct assembly? TIA

 

Here you go:

 

Thanks!

 

Thank you for excellent diagram. Please can you tell me how I should get the arm to come off to replace it? I daren't apply brute force to simply pull it off the spindle in case I break something, but I can't see if there is any release mechanism. Any advice on replacing it would be welcome.
_________
2010 A3 Sportback 2.0 TDI (170)

 

I looked at a new arm off the shelf and it's not a tapered and splined post like I thought it would be. Instead the inside of the arm where it mounts to the post looks smooth and machined straight (not tapered). If tapered it would usually be tougher to remove off the post. So, you should be able to remove the nut 15 and pull that arm off. I don't see anything that should hold it down other than the nut. Try to pull up on both sides of the arm, don't pull from just one side since the arm has to come off straight up from the post. That fitment will be tight as it's machined so as not to have space between arm and post when tightened down.

 

Thank you!