Rust Problem For All B200 Bonnets (Revised) - Page 2 - Benzworld.org

gsp1 · 06-10-2007, 02:43 AM

Photos of Derek's Lecours car..

Derek Lecours · 06-10-2007, 07:15 AM

Many many thanks to 'gsp1' for helping me with these pictures.
The cavity wax we previously talked about is visible around the holes.
All inner spaces are coated with cavity wax but not blocking the flow of water exiting the holes. Derek

jtcb · 06-10-2007, 10:39 AM

OMG..

I better check if my B has these or not. Is there any way to prevent/fix it?

kdbcom · 06-10-2007, 01:23 PM

Thanks for the useful information Derek & GSP1 those pictures really save a thousand words.

gsp1 · 06-10-2007, 02:58 PM

Ok this seems too serious.. BUT i think i am not willing to drill my bonnet !!!

I'll ask also my local dealer to see what they will say... what about the corrosion guarantee? i think mercedes gives 30 years? (!) or not?

Derek Lecours · 06-11-2007, 07:46 AM

Read the script, drill the holes,it's as simple as that.
In Canada we have a 5 year rust out warranty, not like the rest of the real world which has 30 years.
It hurts to drive a beautiful little car in such harsh winter weather, but such is life. I plan to beat this problem before it starts.
Rust is like an aggressive cancer, it's very hard to stop once it's started. Check out similar postings at the bottom of this page.(ie:SA Won't Address) Derek

Derek Lecours · 08-04-2007, 08:32 AM

So has anyone out there noticed if the newer B class has better drainage in the bonnet than my B from Dec. 2005. Derek

kdbcom · 08-05-2007, 07:14 AM

On the bonnet on my June/July 2007 built B they have added additional drainage Vents/holes

Have only recently noticed this with help from Derek's photos (thanks)

Keith

Derek Lecours · 10-15-2007, 11:50 AM

So the insulator I've installed is to eliminate water being splashed up and trapped as is the case in all of the B class to date.
I still recommend drilling the holes as humidity will still collect if the drainage openings aren't there.
Cheers, Derek

Derek Lecours · 10-23-2007, 02:31 PM

I've included more pics. of the bonnet with the black plastic trim removed.
The holes on each side should have rubber grommets installed.(IMHO)
This would prevent water from entering and tracking to the front and staying there and causing rust.
When washing your B, you always see water accumulate where those openings are, at the lip of the black plastic.
I would expect that while driving, that water would be driven into those same holes.