This is a 2008 car, so will have the ordinary solid cam gears (later models have an anti-backlash gear). The older design will break its cam chain side plates - usually at around 120,000 miles. There will be no rattle, because the chain will not be worn out. Regular oil changes make no difference because it's not a lubrication issue.
If your timing chain has been replaced - Happy days.
If your timing chain has not been replaced then get it done ASAP. A replacement chain set is not cheap, but a broken cam chain needs a lot more work and many more parts. I took my engine and gearbox out of the car for better access. I was very glad that I did. Access is horrible in the car.
When the chain is replaced, get the rockers and lifters done at the same time. Rockers jammed by falling out needle rollers risk damage to damage to the cams. These are done without touching the head gasket and minimal additional labour on top of the cam chain work.
I also suggest you check inside the intake manifold for carbon buildup. The air pipe is fiddly to remove but a flashlight and mirror will tell you if there is anything to be concerned about.
