[Jarnu]

Change

pawn Code:

new IsPlayerAttachedObjectSlotUsed(playerid, index);
new RemovePlayerAttachedObject(playerid, index);
new SetVehicleParamsEx(vehicleid, engine, lights, alarm, doors, bonnet, boot, objective);

to

pawn Code:

new IsPlayerAttachedObjectSlotUsed[playerid, index];
new RemovePlayerAttachedObject[playerid, index];
new SetVehicleParamsEx[vehicleid, engine, lights, alarm, doors, bonnet, boot, objective];

and about ManualVehicleEngineAndLights
add this line here

pawn Code:

public OnGameModeInit()
{
ManualVehicleEngineAndLights();
}