A6 - 1996: replacing heated rear window switch

The switch for heating the rear window and the electric mirrors appears to be burnt out (does not stay pushed in when pushed).
Is it possible to replace this with a switch which is just for heating
the rear window? The pin configuration is identical. The part numbers are 4AO 941 503 F (EHS + ZR) for the dual function switch and 4AO 941 503 for the single function switch.
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