Posting here, because this forum actually has some participation. Tried in the Tech Forums, but they're nearly dead. Issue is still relevant, despite the difference in vehicle:

Just took delivery of a 2019 SLC300, with Pirelli Cinturato tires, 225/45R17 front, 245/40R17 rear.

Sticker inside driver's side door states 33/36 psi, front/rear. Tire sizes on this sticker are correct.

Sticker inside fuel filler door states 30/32 psi front/rear.

Check your own sedan vehicle--do the stickers agree?

How can I know which is correct on my car?

 

I believe on my W205, the higher pressures are indicated for regular speeds over 100mph, or something like that. I think the lower number matches on both for mine.

 

Go with tire pressures listed on fuel filter door.

 

Why that one?

 

Because Mercedes tells you that's the one to go by. http://mercedes-benz.custhelp.com/ci...0pressures.pdf

The door shows you the maximum amount the tires can hold.

 

I'll buy that. Thanks for the link. I wish that this had been fleshed out better in the manual.

 

I agree with fuel door.

 

Definitely fuel filler door - I don't know why Mercedes keeps doing this , its very confusing ?