This is pretty worrying for me as I don't want mine to snap, I service it probably very early 5k but didn't own the car for the first 79k, however it's now got no dpf and has done a few trackdays so possibly won't help it.
As for the mercedes comment, I can vouch for the 651 engine as seen in the A, B, C, E, ML etc we have the same engine in the vans. Some of our customer have 300-400,000 miles on the clock with no chain stretch issues at all. Not sure on Audi stuff, but Mercedes don't suffer timing chain snapping.
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