[Konstantinos]

Did you use debug info? It doesn't say why it crashed, it says only the public function:

pawn Код:

CMD:remontuoti(playerid) 
{ 
    if(pDT[playerid][pMasina] == -1) return SendClientMessage(playerid, RED,"* ** You didn't have a car!"); 
    new v = pDT[playerid][pMasina],// pMasina means player Car 
        kaina = ShopVehicles[v][Price]/2, 
        s[ 128 ]; 
    if(vDT[v][death]) 
    { 
        format(s,sizeof(s),"{FFFFFF}Jūsų transporto priemonės taisymas kainuos{FF0000}%i{FFFFFF}LT\nAr tikrai norite susiremontuoti transportą?",kaina); 
        ShowPlayerDialog(playerid, 40, DIALOG_STYLE_MSGBOX,"Transporto remontas",s,"Remontuoti","Atšaukti"); 
    } 
    else SendClientMessage(playerid, RED,"* ** Car isn't death!"); 
    return 1; 
}

By the way, use:

pawn Код:

CMD:remontuoti(playerid, params[])

because maybe if you use parameters (an example: "/remontuoti blabla") it can cause it (not sure).