Now wait a minute. Misfueling should NOT result in fuel pump failure. But even if it were impossible to build a pump that can handle other "solvents" the catastrophic full system contamination is absolutely Dumb. I am not saying that I think I will be one of the unlikely and unfortunate victims, but...
When fuel pump fails, car should stop running. Replace pump, prime if necessary (yes in this case), and drive away.
That's how fuel pump failure used to be. I guess you are not actually saying that now that we've made all of this technological advancement, a fuel pump should be MORE susceptible to failure, AND contaminating the entire system, but how difficult can it be? I mean why would the fuel system be designed to be susceptible to this type of recirculating contamination risk. It is an oversight that should result in a major change in technical design staff at Bosch and/or VW. Really inexcusable. The damage they are doing to fuel systems is bad... the damage they are doing to VW is very serious.
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This post makes it sound like you may not fully understand just how different this car is from not only a gasoline car, but from other diesel powered vehicles. This isn't your Daddy's Chevy - the fuel pump isn't a $90 part you go grab at AutoDrone, replace, and get on your way.
The high pressure fuel pump is basically the core of what makes this fuel delivery system what it is. We aren't dealing with 3-4 bar (40-60 or so PSI) in the fuel accumulator like your modern FI gasoline engines. We are dealing with pressures in the 250-1800 bar (3,000 - 26,000 PSI) range. This requires an entirely different type of fuel injection component than what you see in conventional gasoline engines.
The two pumps prior to the high pressure pump are more like the conventional pumps you find in gasoline engines - They fail, you replace and drive on.
The high pressure pump is different - it operates almost like a little engine itself -a submerged camshaft drives a plunger that pressurizes fuel drawn in from the sump. If something goes awry in the sump, then you've got bad news all around. There's not much like it in the gasoline world. Most fuel pumps are electric, whereas this one is driven by the force of the engine itself - there's a lot of force there to create the pressures required for these injection pressures. That same force is also there to keep the camshaft spinning even when something siezes, this is when things start to go bad. Lubrication is critical - so saying that the pump shouldn't fail when something like gasoline is introduced into the system is a tough call - gasoline isn't very lubricious.
The simple answer to the problem is this: Don't introduce gasoline into the fuel system - or in other words, don't misfuel. Could the fuel pump have been designed to handle gasoline a little better? Maybe - I'm no mechanical engineer; however since the pump seems to be very sensitive to vayring qualities of diesel fuel, something like gasoline is an absolute non-starter.
Basically, what I'm trying to get at is comparing a failure of the high pressure pump in this car to a fuel pump failure in any other gasoline / non CR diesel engine isn't fair. It's apples to oranges.