We bought a C230 manual gear this year - it is about 5 years old, and it has
done 28k miles. It looked pristine at the garage, and drives great. After
about 5 month later, this week, I found a patch of rust coming up on the
corner of the boot, where the number plates are attached. This is a shock to
us, as we thought Mercedes are made very sturdy, and should last long time.
What should we do to prevent for rust spreading?