BenzWorld Junior Member
Date registered: Apr 2008
Vehicle: 1999 ML320
Location: McLean, Virginia
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Update--front driveshaft arrived 5/26 and I put it in the 29th. Been driving a week now and the noise is gone. I'm confident the problem is fixed.
Installation was pretty straight forward. Used jackstands to support transfer case and removed transfer case support (16mm socket needed--best if you have a deep socket). With the wheels blocked and the car in park I first removed the hex head bolts by the front differential. I could reach all of them without having to rotate the front wheels/shaft.
With the front bolts out and car in park I then took out the two accessible rear shaft bolts (16mm again, 3/8 drive socket and breaker bar to loosen, 16mm box end to remove). As the bolts back out the socket doesn't clear the U-Joint, so the 16mm box end was needed). With two bolts out, I put it in neutral, rotated the shaft 180 degrees so I could reach the other 2 bolts, put back into park, repeat.
You need to remove the front hex head bolts first to rotate the shaft unless you have the front wheels elevated. I had mine up on ramps (with rear wheel solidly blocked).
Installation was the reverse, using a bit of blue loctite. Only difference was the that on the four rear shaft bolts I couldn't use the 16mm socket at all. The replacement shaft had a larger U-Joint and the socket wouldn't clear. I pulled em pretty tight with the box end but could't get the torque wrench on them.
About 2 hours total, including a 45 minute trip to buy a set of box ends that included the 16mm (I have at least two sets of combination wrenches and neither came with a 16mm box). If you can get them I'd recommend the 6 point box--those bolts want to round over.
ML now rides fine and quiet and wife is happy to have her car back. Oil change is coming up. After that I may look into changing the CPS I'm reading so much about.
P.S. While her car was out of commision she was dirving my Acura Integra commuter and was rear-ended by an idiot girl on a cell phone driving her mommy's 2007 Volvo. Our car was totaled by the insurance company! So she has her Mercedes back and I'm driving the beater van.
2 Acuras (1 now RIP)
Last edited by kontoboy; 07-22-2009 at 07:30 PM.
Reason: speeling corrections!