There is a high mileage thread somewhere, but in my opinion 160,000km is not high mileage by any stretch of the imagination.
That engine needs to last at least twice that and the rest of the car, well, that's just replacing the bits that wear out and/or fall off ;-)
Especially in Alicante, where you shouldn't have much exposure to road salt etc it shouldn't be too hard on the rest of the car apart from the usual wear and tear items.
There's nothing special about reaching 100,000km, 100,000 miles, 200,000km apart from psychology.
My 147 1.9jtd has 23x,000 km on the odometer and 37x,000 km on the ecu, you pick which value you want to believe as I don't have a clue which is correct.