Changing Wipers

[aarghesfore]

Hi,

I recently bought front and rear bosch wipers but I can't work out how to fit them. The back of the packet shows how quite clearly but does not seem to cater for the RS4 set up where the wiper blades(both front and rear) are covered by a plastic aero cowling type thing. I am probably just being very thick but I don't want to force the covers off in case I break them.

Any fool proof tips would be much appreciated!

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the covers just slide off