Anyone know the size or diameter of the rear axles. Need to replace CV boots. Looking for some aftermarket ones, Astoria I heard are pretty good. Anyone have any experience or recommendations?

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1990 190E 3.0L

use the vin and call the dealer. i would only use gkns but they don't list them, nor does worldpac-for the outers. good luck, chuck.

I really like the Astoria boots. FB-2001's will fit with a bit of stretch, or you can ue FB3000's and trim.

Your axles have the larger CV joints, it's hard to find boots to fit. They are NLA at Mercedes and GKN. Astoria may be your only choice.

Not wanting to gamble, I just went ahead and ordered the oe boots for the car....however I may have it a small snag. Boots will arrive tomorrow, but while driving today I heard the tick tick tick of the axle. I only drove about 3 miles and got the car home and up on jack stands. Boot is definitely ripped, but there is still some grease inside. I grabbed a large syringe and put in about 40 grams of grease and went for a test drive and the noise is gone. With that being said, is it ok to proceed with changing out the boots tomorrow or do I now need a new axle? Thanks.

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1990 190E 3.0L

If the noise disappeared by adding grease, then the axle is probably ok. Please dont drive the car with a ripped boot as the centrifugal force slings out all grease.

Get about 4 packs of CVJ grease from NAPA and refresh the joints and give them a real good wash to remove any dust/dirt that has gotten into the joint from the torn boots, You will need some anerobic sealant for the diff flange mount and some rubber to metal sealant on the boot to shaft joint to make a first class repair job.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)