This is getting to be the norm, as joosepi said - younger techs lack the methodogical flow pattern to detect a problem - they simply want to read a screen and replace what its saying.

e.g. it takes a little learning experience to drip time a mercedes diesel, for them timing usually means aligning a chain or belt.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)