For those on the fence
Last edited by Daso; Jun 7, 2021 at 10:25 PM. Reason: error
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Stock 20" wheels' offsets are et55 front and et42 rear (difference of 13mm or about 1/2"). So if rear et42 wheels are placed upfront and front et55 wheels are place on the rear, to compensate out the back one would need to run at least 20mm spacers for et35 (55mm-20mm) for difference of 7mm which is close enough. H&R makes 20mm DR spacers p/n 4055665 for Mercedes (there are no DRA spacers for 15x1.25 bolts as of yet) and now they have 64mm 15x1.25 bolts p/n 15256407 (yes bolts are 1mm shorter but are still safe and is the longest bolt they make).
There could be some unintended (or intended) benefits: it will certainly look better as stock's 20" wheels are way too much "in" and the handling with wider track should benefit as well. Above is in no way a recommendation, just an option which is now available thanks to availability of proper bolts for those on stock 20".
The Best of Mercedes & AMG
Stock 20" wheels' offsets are et55 front and et42 rear (difference of 13mm or about 1/2"). So if rear et42 wheels are placed upfront and front et55 wheels are place on the rear, to compensate out the back one would need to run at least 20mm spacers for et35 (55mm-20mm) for difference of 7mm which is close enough. H&R makes 20mm DR spacers p/n 4055665 for Mercedes (there are no DRA spacers for 15x1.25 bolts as of yet) and now they have 64mm 15x1.25 bolts p/n 15256407 (yes bolts are 1mm shorter but are still safe and is the longest bolt they make).
There could be some unintended (or intended) benefits: it will certainly look better as stock's 20" wheels are way too much "in" and the handling with wider track should benefit as well. Above is in no way a recommendation, just an option which is now available thanks to availability of proper bolts for those on stock 20".
Last edited by TexAg91; Jun 8, 2021 at 05:59 PM.




Spacers are not recommended by tire shops or Mercedes, the risk is probable minuscule. Tire Rack quit selling spacers,Carid won’t sell them. A lot of aftermarket wheel buyers use spacers so…. It wouldn’t bother me to use spacers.
On my 450 I decided to rotate at 12k instead of 6k…not optimal but better than not rotating at all. By 12k a wheel balance is overdue anyway. Theoretically the front tire wears more than the rear from added engine weight and more tire scrub. To rotate or not to rotate?
Regarding mounting/dismounting tires. My MB dealer charges $160 mounting/balancing plus an other $160 for RFB.



