Been searching and either our cars age well from factory's underbody protection, and such, not too much conversations around this topic.
Even if the factory intention of protecting the undercarriage is good and all (eg. germany, i would think their winter is nothing to laugh about), other stuffs like fasteners, brake lines, suspensions, etc. are left susceptible?
So first winter here in North Carolina triangle area. Moved down from Boise, Idaho.
And past days hit with what i would consider a small snow falls, and NC tackled with salt brine's and road salts, which after following day turned the roads with those white residues.
Solutions: don't clean, clean, don't drive, don't live in place that do this, ...
I would like to tackle the cleaning, when the temperature warms up next week to 50's and 60's (go figure to this inconsistent winter in NC, but also best thing about inconsistent winter).
I've picked up from various comments and articles on doing pressure wash (using moderate pressure), lawn sprinkler idea, run your car over tall glass, drive over large puddle, and list goes on.
Including do not do it, eg. can damage your transmission sensors, perhaps strip factory's underbody protection. Perhaps these failures are from not using moderate pressures.
So, how do folks in areas where salt brine's and road salts are used, say in inconsistent winter season, or not, go about maintaining their car's underbelly?
Current thinking is around doing pressure washing using something like this item, though nozzles themselves are not adjustable, the pressure can probably be adjusted from the pressure washer system,
Any suggestion welcomed.
I'm going to post this inquiry to two other favorite forums, m3forum.net and bimimerfest, and will try to roll up comments from others. I don't think e46 m3 is any different in cleaning its undercarriage, but wouldn't hurt to get their forum sayings.