ProV1, a hockey puck works fine in a Sears floor jack cup when jacking under the lift pads. Not sure if I would use a hockey puck with jack stands though ... it would depend on their configuration. The AC brand jack stands look ideal for supporting a MB under the lift pads. I prefer using ramps when I'm doing work which doesn't require removing the wheels ... drive up onto the front ramps and use a floor jack to lift the rear wheels onto the rear ramps.

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Fred Hoelzle