That is definitely a patch job. Look at how the surface bulges/curves out unevenly.

The W201's have a floor jack/lift mount pads at each corner, beneath the jack points. I would use those instead if they are still present.

But you'll need a floor jack for these.

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Do yourself a favor (like I did) and get yourself a small floorjack and a pair of jack stands and save yourself some grief. I have the jack tubes but like absolutley all of these cars- mine are rusting. I do NOT trust that they will not allow the car to shift if I am changning a tire on the side of a freeway, endangering me, my wife if she had to try to do this, and/or the underside of the car. So SAFETY FIRST spend $20 on a cheap pair of jacks stands, and $30 on a cheap floor jack from your "local importer of chinese tools" freight, and thank yourself for having them the FIRST time you have to swap a tire on your car. Not joking here Having changed the tires on the 190 a few times now, I can't even imagine the nightmare it would have been without my cheapo floor jack and jack stands (which stay in the trunk always!)

I have a floor jack and 3 of those pads are still there (need to order one to put on the driver's side in the rear). I was hoping I could just use the standard jack so I wouldn't have to lug around the weight of a bottle jack or my floor jack, especially when I'll eventually need the trunk for a subwoofer or two when I can get around to upgrading the sound system.
Should I go with a 2 ton or a 4 ton bottle jack?

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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.

sissor jacks were common in many american cars and weigh much less than a floor jack. check the junk yards to find a lighter weight option for when you are stranded with a flat. Keep the floor jack in your shop for 99% of the jacking.

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You can't always get what you want, but if you try sometime you just might find you get what you need.

Ahh I was thinking I could do that too. It would have to be a better jack than the one from our mercury, worst designed jack I have ever used, took me 30 minutes to get the car up enough off the ground enough to get off the tire. But I am thinking I can store a scissor jack or a small bottle jack under the rear seat along with other emergency replacement parts

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Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.

The floor jack I have is a 2-ton, weighs 15-20 pounds in the box. The jackstands are in a similar-sized box and weigh about 15 pounds. I can get the car safely in the air in about 20 seconds. And, I have a 12" dvc sub mounted in a vented enclosure with a 400 watt amp...

Sometimes you may have to get the car elevated a little with a flat to get a floor jack under something good to lift on.

Pretty well totally collapsing sissor jack may be the best overall bet. One with a extension rod combined with the crank handle. Should be very cheap to find a good used older one. That should also meet your total needs on the road.

Stan Marsh "Jacking-it in San Diego" Music Video - YouTube