Gp17gt

I was inspecting my CPO 17 Amg GT. And underneath just doing a quick
look I noticed these spots under the car in front of both rear wheels near the rubber jack points. What is this? There is no accidents on this car and I just bought it from a
Mercedes-Benz dealership and it is also CPO. These spots seem odd to me. Can someone please chime in.

Gp17gt

Here’s another spot....

JAM-Benz

Hi there ! When I purchased my GTS I was concerned too. They explained to that it's an undercarriage coating that's put on the car when shipped.

JAM-Benz

I took a quick pic of mines it's in the garage but I couldn't get good light but you get the idea

JAM-Benz

Pic Attachment 424548

Gp17gt

Glad I’m relieved... it looked like someone patched it. I didn’t think Benz would
leave it this ugly underneath.

prktkljokr

Now if it did not look like that I would be worried, you can see that the coating has been applied by the factory, it is very hard to replicate factory seam seal and coatings with off the shelf products we get in the repair industry.
Plus if it had been repaired there would be other tell tale signs like sill clamp marks, fresh sealer, over spray etc.

ZephyrAMG

That’s normal. Those are seam antirust putty that placed on weld seems to prevent rust at the seem. You actually are lucky you have a good amount! It looks good and covers it well! Sometimes they don’t put enough.