well it says it passed the coolant pressure test. that is a sign it's not leaking.
I would make sure the subframe isn't cracked, didn't notice the dealer saying they checked that?
Otherwise yes it looks like things you can do yourself.
oh an crayon interior smell is different from coolant smell. crayon is often common on e46 from the vapors released on the sound deadening material under the back seat. if you Search crayon smell you'll get lots of returns.
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