Very minor rust on 2012 R350 wheel rim fender...DIY or dealer.. - Mercedes-Benz Forum

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post #1 of 6 (permalink) Old 12-30-2013, 11:31 AM Thread Starter
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Lightbulb Very minor rust on 2012 R350 wheel rim fender...DIY or dealer..

Hey guys I am new here and thanks for the countless threads of useful information on Benz which helped with my purchasing decision. I've recently purchased a late 2012 R350 bluetec CPO from one of the local Toronto, Canada dealer this year August and so far I am extremely pleased with this car other than some minor interior wear and tear issues that I am trying to get fixed.

While washing the car, I noticed that a small part of the paint was chipped off on the passenger fender on the bottom of the wheel well where it meets with rocker panel. A bit of rust have developed and it must have been there for a while. I am wondering if I can just do a DIY fix by sanding the rust away completely using multiple grit sand paper and then apply several layers of the touch up paint?
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post #2 of 6 (permalink) Old 12-30-2013, 11:43 AM
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I would go to the dealer and complain, it worked for me, they split the cost. Of course they inflated the price so it tuned out to be 1/3, 2/3 but they gave me a car to drive while it was in.
I had to go twice because they sprayed so much "wax' the gaskets kept on coming off....
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post #3 of 6 (permalink) Old 12-30-2013, 06:53 PM
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Touch up paint will not look very good for the repair. It wil need to be properly prepped and sprayed to look good.
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post #4 of 6 (permalink) Old 01-02-2014, 09:53 PM
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I agree with both previous posts. I would use the "persistent pressure gently applied" approach with the dealer first. If no redress from the dealer and you have no experience with treating rust, I would suggest finding someone who will do a correct job. If you get it early enough and completely eliminate and encapsulate the affected area and then prime and paint it, you should be fine.
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post #5 of 6 (permalink) Old 01-03-2014, 09:49 AM
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Try with the dealership first. They would argue that this is the result of a rock chip and you should have taken care of it soon after the rock chip. Although there is no way to tell if this happened before or after the sales, it's probably after the sales because you would have noticed it earlier. Maybe there will handle it as a goodwill gesture.

If no luck, you can always try MB Canada 1-800-387-0100.

As for the questioned if this can be a DIY, it all depends on the size and the location of the rust. Main question is would it show after the DIY? To fix it properly would involve sanding, primer, spray paint the whole panel.

If you decide to get this professional repaired, go to Western MB. They do great work.
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post #6 of 6 (permalink) Old 01-03-2014, 08:05 PM Thread Starter
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Thanks all for the tips. I will bring to the Mercedes Bodyshop tomorrow and see what they say. The size of the chip is very small, about half your little finger's nail size and is located away from the exterior surface. It is right at the inner sheet metal folding on where the fender meets the rocker panel:

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