Had the car for 6 months now and it falls out of MB warranty next May. Debating whether to renew the warranty or not and whilst the car scares me still (no bad thing) there is a thought about what it would be like with a Brabus tune and/or exhaust on it. Not sure how different the Brabus exhaust would be to the current which sounds great I think (and so much better than sports exhausts from Audi RS and BMW M), also what difference the Brabus 700/800 package would be. The prices are of course 'on request' so can anyone shed light on real world differences and cost please? May well be that I just leave it stock (she's running at least 620 bhp and 660 lb ft torque confirmed on a dyno) but just toying with the options.