Hi, I am looking at buying a 2000 year model Clk 320 convertible. The car seems in a great condition, drives well and the roof is super quiet and works 100%. I have been warned that they are prone to rust. I can not see any rust but would like to prevent it from rusting. Can anyone suggest what one can do? Also where can one get parts for these cars? The one door speaker cover is damaged. Is there anything else I should look out for on these cars?

Thanks
Kobus