Automobile organisation like Mercedes, Toyota, Mahindra and General Motors today failed to get any relief from the Supreme Court, which extended till April 30 the bar on registration of diesel-run SUVs and high-end cars with engine capacity of 2000 CC and above in the National Capital Region. The bench said that the interim order banning registration of diesel-run vehicles with engine capacity of 2000 CC and above will continue till April 30.