SLK 250 2013 Chassis rust

[StuMoore]

Hi guys please excuse the new profile. Long term member but for some reason my old profile won't work.

Our SLK was serviced this week and the mechanic noticed that there is a chassis brace inside the engine bay under tray that has got very rusty.

Does anyone have experience of this and know the correct name for the part. Any I come up with draw a blank.

Thanks

[trevalvole]

Front subframe?