What you haven’t told me, Luke, is whether your car has a petrol four-cylinder engine or a V6 turbo-diesel. In any case, the petrol engine fitted to this series of A5 Audis used a timing chain, so it should never need replacing as it’s designed to last the life of the engine itself. That, however, has not been the experience of every owner of these cars, and timing-chain failures have been a hot topic of discussion on these four-cylinder turbocharged engines.

The V6 turbo-diesel, however, does use a toothed rubber timing belt, and that, along with its tensioners, does need to be changed at regular intervals. The trade reckons that interval should be every 120,000km or every five years, whichever comes first. That’s because rubber deteriorates with time as well as kilometres. The other piece of advice is to change your water pump while you have that part of the engine pulled apart. It’s a lot cheaper to do both jobs in one go than to open the engine a second time to replace the water pump.