Be very, very, very carefull with spacers!!! You really should not use them on a Mercedes your wheels could fall off and kill you!!! The hub supports the wheel not the lug bolts, by putting spacers on their you are making the bolts take the load, they are not built for that and can share off. I went threw this with my SDL when I got the wrong wheels, they were to wide for the car. The only "safe spacers" to use are the H&R hub centric ones, their 40mm wide and extend the hub to support the rim. But the wheels will stick out and look stupid with them, not to mention their $150 a set so figure $300 for the whole car. Just buy the right wheels.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200