[Konstantinos]

pawn Код:

new modelid = GetVehicleModel(GetPlayerVehicleID(playerid));
format(VText, sizeof (VText), "%s", (modelid) ? (VNames[modelid - 400]) : ("N/A"));
VTextLabel[vehicleid] = Create3DTextLabel(VText, 0xFFFF00FF, vX, vY, vZ, 50.0, 0,0);
Attach3DTextLabelToVehicle(VTextLabel[vehicleid], vehicleid, 0.0, 0.0, 2.0);

You should first format and then create the 3D label because the text will be NULL and the server/client might crash. You also declared VText with size 50 and you used 128 in the format. It shouldn't be longer than the original size.