Looking to upgrade rims on my old Mercedes W211. The spec of the Mercedes (from wheel-size.com) is as below:

PCD : 5x112
Center Bore : 66.6 mm
Offset : 36 - 40 mm

I like the looks of an Audi rim, much nicer compared to Mercedes. And cheaper too. When I asked Google and ChatGPT, both of them said that Audi rims will not fit because of a smaller center bore. But the wheel has this spec:

PCD : 5x112 (same)
Center Bore : 66.56 mm (only 0.04 mm difference!)
Offset : 39 mm

Surely the 0.04 mm difference will not be a problem right? That's less than a thickness of a hair!

Has anybody successfully installed Audi rims on a Mercedes before without needing to enlarge the bore? Or use adapters?

try hammer it sikit.
last time i use wood router (drill tools cost below 100) with correct size cutter to enlarge 60mm to fit 66.6.

alu wheels are soft. cut slowly. althought my cut not perfect nice, luckily no affect balancing