Questions & Answers about הנה, הגרר מגיע.
The prefix ה־ is the Hebrew definite article, the equivalent of the in English. Hebrew attaches the directly to the noun instead of writing it as a separate word.
With vowels, this part would be written הַגְּרָר.
Hebrew normally does not use a separate present-tense word for to be in sentences like this. The form מגיע already expresses the present-time idea.
So Hebrew says הגרר מגיע, while natural English says the tow truck is coming or is arriving.