[550maranello]

These photos are of a '91 300E. Last pic: I am concerned about the area by the front lower control arm. I can’t tell if it’s rust or just peeling undercoating

Please kindly let me know if it can be repaired.

 

[sbaert]

Unusual, but looks age related. Attack the problem now, while the rust is minimal, as once the cancer starts you can never fully get rid of it.

 

[khomer2]

As a courtesy to all readers, kindly complete your member registration by filling in your complete vehicle profile.
Your vehicle profile info will appear under your avatar, then readers will see/identify what you have and respond accordingly: Complete your Profile

 

[rayhennig]

Attack the problem now, while the rust is minimal,

Yes, definitely that.

And is your cat damaged? I had similar on my coupé and I pointed out to the test man. He hadn't noticed it. So he marked it as split but not critical. No problem as I had another in stock but he did annoy me rather. The last test guy kept saying "... belle voiture .." from underneath so I'll use hime next time.

Sorry to diverge.

RayH

 

[4Matic 300TE]

Why not just get underneath and scape it off. Then you will know......!

 

[tuttebenne]

Yes that is a serious issue developing. As Sbaert suggested, get someone on it now because this is what you can see today. A more close inspection might reveal more rust in other areas. This and related areas need to be cleaned with a wire wheel at a minimum and treated with an anti rust solution. If the rust is more than just surface rust, then new metal will be required.

 

[boyd waugh]

Your under belly panel is missing?
As Andy said, get in there with the wheel of death and paint it some.
All of us UK members can tell you all about rust!
The car looks very good underneath generally and I would struggle to find one so good here.

 

[khomer2]

Dry ice cleaning

 

[sbaert]

Not "just paint" but a coat that is meant & intended just for this application. Here is one that is top notch, and cheap to boot.

Eastwood Heavy-Duty Anti-Rust in Black

Spray inside doors and rockers where painting won't be required.

www.eastwood.com

 

[ianrandom]

That Eastwood stuff is great. I would get that wheeled off as suggested and coated up ASAP.