I have a 2016 G550 One owner with 25,000 miles. Getting vibrations, so replaced steering stabilizer as well as new alignment and tires road force balanced through dealer and it’s significantly helped with vibration in seat and steering wheel. But noticing at 1500 RPM‘s and 2200 rpm’s a vibration. While driving at 1500 RPM’s and take my foot off the excelerator pedal vibration goes away, same at 2200 rpm’s. So I put the vehicle in neutral slowly rev the vehicle to 1500 and engine shakes and same at 2200 rpm’s. Dealer said they checked motor mounts and transmission mount and they are fine. Any ideas on what this could be or has anyone else experienced this?
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I assume your mechanic has checked and ruled out spark plugs, coils, and fuel injectors (?).

 

You ought to post this in the W463 sub forum

 

Engine mods? Tuned?

Read codes.

When did you last change spark plugs?

Sounds like engine mounts (ignore the dealer any time his/her lips are moving) or misfire (ignition/plugs/coils/boots).

 

I had the same issue with my 2016 G550 with only 5000 miles back in march 2022 In order to correct issue they would have to update the software! It also fixes mph usage etc…

 

did you resolve your issue and if so what was it?