Yes, salt is a killer. It is being used in Ireland now as well unfortunately. 25 years ago this did not exist, there was black ice on the road and people simply crashed their carsIn the northeast USA, we get snow, and roads are treated with a lot of salt.
Shortens life-expectancy a lot. Both of our vehicles are approaching 8 years.
The key to a vehicle to survive those conditions is: corrosion protection wax or grease (apart from good design practices). Mercedes Service instructions include cleaning the underside and applying a wax coating on everything every 3-4 years. Pretty much nobody got that done at the time. But I bought a W124 once, 17 years old, driven 17 years in Stuttgart (plenty salt in winter), but always waxed as per instructions. The whole suspension underneath looked like new.
And I knew a 200 fintail that was driven for over 40 years as a daily driver in Stuttgart as well. The fintails were very poorly designed rust wise but the first owner got it corrosion protected inside when new and inspected the underside every year and repaired rust damage and waxed it. The car looked like new when I saw it 40 years old.
Based on that experience a friend of mine partially disassembled his brand new G-Wagon with 40 (in words: forty !) miles on the clock and applied wax in all areas that were not protected properly. His wife thought he'd gone nuts taking a new car apart
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