Rear drive axle shaft not fit, can be pull out and push in with in 5 to 6cm

I don't know that you can received my e-mail or not, but I try to update from the website here. To confirm with you that the gap is about 5 to 6 mm and the drive axle shaft is original and the problem only happen at right hand side only.

Not sure about the Mercedes , but I have had several Honda Odysseys and Pilots with the EXACT same symptoms , get the splines checked , probably needs an axle but there may be an issue with where it goes in , also.