Current setup is as follows

Front:
275/30Z R19 96Y
Rear:
335/30Z R20 104Y

When I search on websites for matching tires I don't get results. However when I search for each set by itself by size(front/rear) I can get results. I'm not sure why this is. Looks like I can get some Pirelli P-Zeros though.

The fronts say the following:

Size: 275/30R19 96Y XL
MO Mercedes
Sidewall Style: Blackwall
UTQG: 220 AA A

The rears:

Size: 335/30ZR20
Sidewall Style: Blackwall
Serv. Desc: (104Y)
UTQG: 160 AA A

I can only guess that they don't match up based on tread ware and load perhaps, but I assume these are cool to run.

Thanks for any information.