Mercedes Benz A 2108208410 Console Window Switch Quad (Sedan)
Used for certain E300 Diesel, E300 TurboDiesel, E320, E420, E55 (verify fit for your particular options before purchase). This part number (and updated part number 2108214051) includes a trunk opening switch and is for models WITHOUT baby seat recognition.
Other versions of this part do not have an integrated trunk switch (though it may be in your center console as a separate switch). This part has a trunk switch immediately adjacent to the mirror adjustment (not further to the left, as is the case when the switch is separate).