What is this white stuff?
#29
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2012 CLS63
#31
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'09 SL Black, '12 ML63, '13 SL63, '14 E63 Wagon, '14 458 Italia
Seems like you just hit a big puddle if nothing re: your cleaning routine has changed. Under body sprayers can sometimes get water that high in the engine compartment, but I'd definitely wipe it off and see if it happens again, just to be sure.