To keep or to trade

[RP64]

I have a 5 year old vauxhall insignia 2.0cdti with 120,000 miles on the clock. It has never missed a beat so far and I have serviced it regularly all along. Had a major service with cambelt, water pump and tensioners at 90,000 miles. Should I keep driving it for a couple of years ( in which time it'll be up to 170k miles) or trade it in now? What, if any problems, am I likely to run into in the next couple of years?

[RP64]

I actually don't think it's too bad a car. I can't call it exciting to drive but it's quick enough, very comfortable and good for the 25k miles a year I do.