I cant understand how you have smashed it unless you have been too rough. The bulb holders are simple little bayonet fittings and come out easily but with care. If you have broken one, pop into your local MB benz dealer for a replacement, they are about £7.50 each. If this has turned out to be too much of a fiddle, go to Halfords and they will fit your bulbs while you wait for a fiver. (and they don't remove any bodywork!