[Miguel]

Retrieve your vehicle's ID and compare it to everyone elses vehicle ID.

pawn Код:

new my_vehicle = GetPlayerVehicleID(playerid);

for (new i = 0; i != MAX_PLAYERS; ++i)
{
    if (GetPlayerVehicleID(i) == my_vehicle)
    {
        // Player with id stored in i is in your vehicle.
        break;
    }
}