Has anyone replace the rear subframe (differential) mounts on their W210? I removed the bolts, dropped the differential (and exhaust system) but could not get them out. I tried using a cup (actually a 3" hole saw) with a 7" X 3/8" all thread through it and a 2.5" diawasher (stacked with other washers to get to the 3/8 " ID for the all thread). I put nuts on each side and started cranking....the mounts would NOT budge! I noticed a tool offered on the internet for this job for $115. If I knew it would work flawlessly I may consider getting one (as bad as I hate to spend that much on a tool I will use only one time).
Thanks in advance for any insight.

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