Ruling on hanging Soorat al-Ikhlaas on the rear window of the car as a reminder
Question

                Is it okay to print out Surah Ikhlas and hang it from the inside of my car back window showing out as a form of Dawah?

Also, is it permissible to put the word god next to Allah in translation to help those who may not understand?.
Praise be to Allah.
    There is nothing wrong with hanging Qur’aanic verses for the 
    purpose of reminding and exhorting, so long as they are put in places that 
    are appropriate, such as the walls of meeting places and offices, in such a 
    way that the verses will not be exposed to disrespectful treatment. 

    In the case of hanging verses in car windows, there is the 
    fear that they may be exposed to disrespectful treatment and damage, so it 
    is better not to do that and to be content with some adhkaar or advice. 

    Shaykh Ibn Baaz (may Allah have mercy on him) was asked: 
    There are some who say that hanging soorahs or verses of Qur’aan on the wall 
    is haraam. Please note that these verses or soorahs are only hung up because 
    of their virtues, such as Soorah Ya-Seen or Ayat al-Kursiy and so on. We 
    hope that you can explain the ruling on that; may Allah reward you with 
    good. 

    He replied: There is nothing wrong with hanging verses and 
    soorahs on the wall in offices and meeting places for the purpose of 
    providing and exhorting, according to the correct view. Some contemporary 
    scholars and others regarded it as makrooh, but there is nothing wrong with 
    that if it is done for the purpose of reminding and exhorting, and it is in 
    an appropriate place such as a meeting place or office and the like. (There 
    is also nothing wrong with) hanging a hadeeth of the Prophet (blessings and 
    peace of Allah be upon him). All of that is exhortations and reminders. But 
    if the aim behind it is something other than that, such as believing that 
    they offer protection from the jinn or the evil eye and so on, it is not 
    permissible to do this with that intention and that belief, because this is 
    not narrated in sharee‘ah and there is no basis for it. And Allah is the 
    source of strength.

    End quote from Fataawa Islamiyyah. 

    But if the purpose of hanging it is to translate the meaning 
    of this soorah or other verses and soorahs of the Qur’aan, then the issue of 
    hanging it is less strict with regard to translations because they do not 
    have the same sanctity as the Qur’aan and do not come under the same 
    rulings. 

    And Allah knows best.