You're right. It's a truffle not an acorn.

Just finished doing the rear shifter bushing. This has to go under the category of "doable but very annoying".

It can be done from above and then on a work bench but my record of removing plastic trims without breaking them is not good.

From under the car there is room to use the bolt/washer/nut method. Use a bolt no longer than 2" or you will run out of room. Too narrow to use a 19mm socket, so I used the box end of a large wrench on the receiving side of the tang. I pulled the bushing in from driver's side to the passenger side. The toughest part is making sure the lips of the bushing are still not tucked under from squeezing it in.

glenmore
1991 300CE, 136m
2000 C280
1990 LS400