GS450hSE Posted 2 hours ago Share Posted 2 hours ago Thumping has no effect at all, whether the light is on (which it is 99% of the time) or being annoying and off. 2008 GS450h (RHD UK) 50K miles and otherwise trouble-free; no local corrosion or similar. I think it's just faulty BALLAST, no need for replacement headlamp unit. Quote Link to comment Share on other sites More sharing options...
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