Most of the w123 MBs I see with some rust always seem to have it around the jack holes.

Why is this area prone to rust?

Do jack hole plugs prevent the rust from starting?

__________________
JWJ
1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG
1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG
Biodiesel, Mobil Delvac 1, and Viton fuel lines!

Any rust that consistantly occurs in the same spot on a given model is from,,, you guessed it,, an engineering or assembly defect. Moisture must be getting in those areas and just starts doing it's work. How to prevent it is something one would have to study to come up with a reasonable solution.

__________________
95 SL500 Smoke Silver, Parchment 64K
07 E350 4matic Station Wagon White 34K
02 E320 4Matic Silver/grey 80K
05 F150 Silver 44K

It seems like a lot of the plugs are missing on the ones I've observed. So, do the plugs, if left in, prevent rust?

__________________
" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

The drain plugs on the wheelwells also deteriorate over time. They need to be covered again with new plugs, otherwise water will seep in there too not just on the jack holes themselves.

__________________
http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg