A dashboard support for a motor vehicle includes a tubular cross member for installation between A-pillars of a vehicle body, and a holder joined to the cross member for attachment of functional vehicle components. The cross member has at least one slot, oriented in a direction transversely to a longitudinal axis of the cross member, for receiving a limb of the holder such as to allow adjustment of a position of the holder in relation to the cross member by sliding and/or turning the limb before the holder is being joined to the cross member.