Has AMG Power Saved Aston Martin From A Decline To Obscurity?

That would be a 'yes'.

I have a DB9. It has the same parts as a 2005 Volvo and/or Ford Europe products (that would be a Ford Focus to Americans). It I ever get in an accident while driving it, its lack of safety features will quite possibly render me a paraplegic or send me to heaven. Hence, for these and other reasons, it has depreciated 70% since I bought it in 2014.

I will likely own it forever because (a) it rarely gets driven; (b) I feel so gypped by the depreciation that I can't muster the will to bite the bullet and just trade it for a new S-Class, (c) despite the above it is fun to drive, beautiful, and passers-by love taking pictures of it (or least they currently do while they are still unaware that the DB9 has been replaced by the DB11).

I can assure you that just the simple addition of Mercedes switchgear and user interface software to the interior saved it from the bin of irrelevancy. The Twin Turbo V8 Mercedes is icing on he cake. The only thing that would be better would be if Aston just tarted up a complete AMG GT and sold it as an Aston.

In fact, people are fools if they chose the Aston turbo V12 over the MB turbo V8. I'm sure all the TT V-12's will explode/implode in month 38 of ownership, slicing the owners to pieces, just after the meager 36 month warranty is over.

Reliability better than ever. Parts availability no longer as big an issue. Peace of mind up substantially. Yes M-B has removed issues that caused many buyers to look elsewhere.

the depreciation on Aston Martins are just terrible !! im thinking of possibly buying one but then I wonder how much more would I lose even though it would seem a 3 year old Aston already takes a major hit.
can you guys tell me if the car is reliable as a daily driver or would i be at the shop every month like I was on the maserati Ghibli ?

While the deal with MB is quite helpful, what has saved the firm of course is investors. Italian PE money from Investindustrial. $150M pounds at first. And since then, another round at $200M. This and industrial debt notes. House of cards really from a financial perspective. It has suffered losses for the past 6 years and volume has dropped to 3,500 cars sold from over 7,000 annually. They really need to sell double or triple the number of cars all at significant margins to make a go of it. Better yet Mercedes increases their stake and buys them out. With electronics and platform sharing it can be a profitable division.

Aston under Andy Palmer has mastered the art of PR spin...not car building for sustained profit, he is looking for a big payout from an IPO, then retiring. Aston's have the same reliability issues that they always have, just a bit fewer.. they are still pieced together cars from many parts bins of other component manufacturers, Mercedes makes up a small portion of the total... the depreciation is like no other brand in this sector, 50% day one is not uncommon, Dealers are offloading 2,3,4 year old models that the AM factory shoved into their inventory... the DB11 has substantial unsold port stock, the vantage is going to suffer the same fate, the company is too desperate for cash and positive PR Spin to stop overproducing the cars and shoving them anywhere there is a open dealer account on Earth... why over pay for a Dyson Vacuum street sweeper looking Vantage instead of owning the magnificent 911 in the upper reaches of the Porsche 911 cost rank... surely anyone can see that the Targa, 911 Turbo, 911 GT2 ect. is far better looking and holds more Value than the Vantage...more like Dis-Ad-Vantage....

Aston needed a platform/component partner. Mercedes is as good as any. The end result will be acquisition by Mercedes. Dependence will force that. The supposed Aston crossover is likely to be heavily Mercedes based. I'd be OK with an Aston AMG.

AM has the motor situation solved. They better start looking for new designers. The front end of the Vantage is disgusting—looks like a Miata whose grill fell off. And then there's the Ford Focus interior ... my opinion.