I did the most recent change on the 240D from underneath without jacking it up, and had no trouble reaching the drain plug. I also have no trouble changing the oil filter, so I don't understand what PEH is complaining about there.

I've used the Topsider on the 240D, and I always use it on the E300 and VW so I don't have to mess with the belly pans. If the Topsider will get you to change oil when you otherwise wouldn't, then go for it.

Regarding the drill pump, I'm don't think it would handle the heat because you want to do this when the oil is warm. The Topsider comes with two different diameter hoses that are joined by a rubber piece. I had trouble with the larger hose collapsing because of the heat, so I got rid of it and just use the smaller, stiffer hose. Just buy a real Topsider or equivalent and enjoy.

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References