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Old 12-27-2001, 01:23 PM
300EE320 300EE320 is offline
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Join Date: Jun 2001
Location: California
Posts: 326

Autozone is one of many sources. I bought my 14mm hex key from a local industrial hardware supply shop ($4 or so).

Changing the diff fluid is just good ol' preventative maintenance.

I can tell you from experience with my former daily driver (a Trans Am GTA with a limited slip diff) that the fluid does wear out. That car had a bad clunk in the rear when going around a tight left corner. A little research (a lot of worry) later, and I found out that this was a common indicator that the diff fluid is tired. So, while it may be a different make, the fluid experiences the same environment and does not maintain it's characteristics indefinitely.

It's a 20 minute job every few years (assuming you can get the plug out.) Well worth doing.

04 ML500
02 E430

Experience is something you don't get until just after you need it.
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