Maybe its the dealer Blue. I had some probs with broken air con vents and emailed DC Corporate because the dealer wanted to charge me $85 each. Corporate stepped in and said they'd be no charge. I got an email back almost immediately.
When you write to them push the Brand Loyalty thing and tell them you bought a Jeep because of the Benz tie up - I'm bloody sure you wouldn't have the same problems if you'd bought a Merc...
Mind you, Leo Muller Greenslopes still owe me the $180 for the vents....must ring them tomorrow and chase that up.