"Because of the sensitivity of the situation and to secure the people's trust in you, please give up this constitutional right and shift the money to more important and vital items for the community," al-Nujaifi said in a statement to parliament Tuesday. The plea was posted on his office website hours later.
One group of lawmakers refused the cars from the get-go.
Shiite followers of hardline cleric Muqtada al-Sadr said they would not accept the perk after their leader announced that a person who does take the car is "a traitor for his nation and homeland, and moreover, disobedient to God."
Associated Press writers Qassim Abdul-Zahra, Sameer N. Yacoub, Mazin Yahya and Lara Jakes contributed to this report.
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.