I have a Ford Focus S 2013
Mechanic suggested my air filter is very dirty and be replaced, and my Radiator fluid is brown and needs should be flushed. However charges were something like $250.(I opted for just the basic service)(basically you pay the extra for warranty through the workshop)
I assume they basically add some chemical in the radiator and then flush it? A bit like injector cleaning when workshops charge you $100 for a $15 product.
Air filter looks simple to replace myself if it's needed
Any suggestions for either? Thank you
A bit like that, yes, but they're also charging for doing the work.