S210 E320CDI - What is that knocking noise?


MB Enthusiast
Aug 27, 2006
SW London
2012 Audi S5 Cab, 2000 E320 CDI Estate [now gone] , 2010 Mini Cooper Convertible
I have a knocking sound coming from the front end - feels like it’s offside front corner but can’t be entirely sure. It can be felt through the steering wheel too.

Now here’s the strange bit - it only happens or can be felt when the car is fully warmed up and had been on a decent run - no symptoms whatsoever when cold. Makes it a pig to diagnose in a workshop as car is invariably cold (and symptomless) when they get round to checking it

I’ve uploaded a short video recorded at the end of a drive back to London from Reading last weekend and it’s clearly audible. Anyone ever had a similar problem on a 210?

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