See also:

Underbody
Flush the complete underside of your vehicle frequently. Keep body and door drain holes free from packed dirt. ...

Maintenance product specifications and capacities
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MKX in the Market
I'm conflicted over the MKX. There's much to like, but there are substantial oversights — some of which cannot be overcome easily or cheaply by the owner, if at all. For example, xenon headlights, ...