Quick explanation:
A demonstrative adjective always accompanies a noun. In the phrase: Este carro, the demonstrative adjective "este" explains which car you are talking about (this car).

Close to the speaker

	singular	plural
Masculine	este (this)	estos (these)
Feminine	esta (this)	estas (these)

Away from the speaker

	singular	plural
Masculine	ese(that)	esos (those)
Feminine	esa (that)	esas (those)

Far from the speaker

	singular	plural
Masculine	aquel (that over there)	aquellos (those over there)
Feminine	aquella (that over there)	aquellas (those over there)

Long Explanation:
Demonstrative adjectives don't use an accent. This rule is applied only on pronouns. Let's look at some examples:

Me gusta este perro.         - I like this dog.
Prefiero estas computadoras. - I prefer these computers.
Voy a comprar ese coche.     - I'm going to buy that car.
Me gustan aquellas casas.    - I like those houses.
Me gustan aquellos gatos.    - I like those male cats over there.

Notice that demonstrative adjectives are also determined by number and gender.

Prefiero este suéter    - I prefer this sweater.(masculine, singular)
Prefiero estos suéteres - I prefer these sweaters.(masculine, plural)

Prefiero esta blusa     - I prefer this blouse.(feminine, singular)
Prefiero estas blusas   - I prefer these blouses.(feminine, plural)

Note:If the Demonstrative does not have a noun next to it, then it becomes a pronoun. This is explained in the Demonstrative Pronouns lesson.