This sounds like a body computer problem. The body computer is the brains that controls a huge range of features but, tellingly, also the climate control and entertainment systems, as well as functions such as the wipers, central locking and much more. These computers can sometimes fail and require replacement, but sometimes they can be rebooted or 'returned to factory settings’ to use an IT term.

The easiest way to do this – not to mention the cheapest – is to disconnect the car’s battery and leave it overnight. It sounds odd, but this will sometimes force the reboot it needs to begin operating properly again. It doesn’t always works and even if it does, the effects may not be permanent. But it’s well worth a try before you take it to an auto electrician or specialist.

This has been an ongoing problem for car owners for decades now. Car-makers often decide to fit self-levelling rear suspension in cars like station-wagons as it ensures the car doesn’t sit nose-up when it’s carrying a big load. But as you’ve discovered, replacing those adjustable shock absorbers can be a huge pain in the wallet. And, like tyres and brake pads, shock absorbers are often regarded as wear-and-tear items and therefore aren’t covered by a factory warranty. Certainly not a year out from the expiration of that warranty. That said, I agree with you that 55,000km is not the expected lifespan of a modern damper. 

In the past, the solution has been to fit conventional dampers in place of the adjustable ones and live with the loss of the self-levelling function (which most owners manage to cope with). The Mondeo is a much more popular model in Europe than it ever was in Australia, so shopping online in, say, the UK might turn up a set of replacement shocks for a lot less than the extortionate figure you’ve been quoted. Provided you deal with established, reputable online companies, you should have no problems. But if conventional (non-adjustable) dampers are available from a Mondeo without the self-levelling suspension, that would probably be the smart way to go to avoid being in the same boat in another 55,000km.

I’m not sure why you’d need to change the rear springs as well as moving to conventional dampers (not that I’m doubting your research) but even if that was the case, a set of springs is a one-off purchase and shouldn’t cost much. The best bet would be to visit a suspension specialist and have the car measured up to see what dampers will fit and do the job. There’s bound to be something out there from another make or model that will physically fit and provide the damping performance the car requires. Self-levelling suspension is a nice touch, but it’s not an absolute necessity on a car like a Mondeo wagon.

The Titanium is the top of the line Mondeo model, the Trend is the mid-ranger. Compared to the Trend the Titanium has 18-inch wheels, 9 speakers, power adjustment for the steering column, a body kit, glass roof, headlamp washers, heated rear seats, automatic parking, and sports pedals.