Specifically, they are on a smart fortwo (450) but in the hope that MB configure all undertrays similarly can anyone offer any advice on how to remove the damned things? I have the front one lowered at the front and need to remove it from where it is 'hinged' across the car's belly. How??? I thought it was a tongue and groove affair and I can see what appears to be tongues but no grooves or slots. The rear of the front undertray appears to be bolted to the chassis underside with raised towers as part of the moulding, but I'm damned if I can see how to access the bolts. Any ideas anyone? I need the tray off (not just lowered) to replace brake pipes which, conveniently, emerge from the ABS pump's top most surface. TIA.