(1) I'd read somewhere that it's good to do lots of engine braking... but I didn't see that in the manual. Is that a myth?
Don't think its a myth. Engine braking, AFAIK is good for breaking-in, as long as you don't exceed whatever the recommended RPM limit is, 4000 when shifting down?
(2) Before I figured out the physics of getting myself into the car, I managed the scratch up the leatherette on the lower corner of the driver's door. Is there a good product for removing/diminishing scratches like that?
Hmm...don't know. But I use Vinylex for Leatherette as a protectant/cleaner and really like it. Not sure if it will do anything to the scratch though.
(3) Why did I drive my beater for so long before buying this car?
Because you didn't want a 328 and you didn't want the light steering on the '01 330's!
Thanks in advance.