Porsche GB has announced that it will take Transport for London to court in an attempt to have the new congestion-charging scheme stopped.Andy Goss, Managing Director of Porsche GB, maintains that the new C-Charge is "simply unjust. Thousands of car owners driving a huge range of cars will be hit by a disproportionate tax which is clear will have a very limited effect on CO2 emissions.” Porsche has stated that it will write to the Mayor of London, Ken Livingstone, asking for a rethink on the new scheme. He must respond within 14 days stating that he will act on the request or Porsche GB will begin a judicial review against TFL.If the congestion charge plans go ahead in October, as planned, all cars producing over 225g/km of CO2 will be charged £25 per day.The 2.7-litre Cayman and Boxster are the cleanest Porsche models on sale, producing 222g/km, whilst the Cayenne Turbo tops the CO2 chart at 358g/km. However, a new Porsche hybrid system is due to go on sale in the Cayenne SUV in 2010, with a hybrid Panamera following not long after.And that's another reason Porsche wants to keep the current charging scheme, which sees hybrids gain automatic free entry to London. The new C-Charge scraps that rule and applies the charge solely on CO2 output. Cars producing less than 225g/km will be charged £8, whilst vehicles producing less than 120g/km go free. Plus, any cars with an engine capacity of 3.0-litres or over that are registered before 2001 will also receive the maximum £25 daily penalty.If legal action is taken by Porsche, it will be to prevent the new scheme going ahead, leaving the current scheme intact.