If, the car were hit, it'd be one hell of a fight between nature and the MB. Think of what can be attached in a rush. Actually, the canvas straps over the tires, and cinching them down would go on in a hurry too. Anything is better than not being in the Benz - in the same exact spot. If your MB is new enough - turn the ignition to ON position, so the airbags might activate too.

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'06 E320 CDI
'17 Corvette Stingray Vert