124-720-
05-78 is for very early 124 chassis, up to A210852, which is roughly early 1986 production. I didn't realize the seals changed. You want 124-720-
11-78 and 124-720-
12-78. Both are available new from the dealer, but the price is nuts... $745/$660 USD list price, respectively.
Boot lid seal is 124-750-03-98 as of chassis A561621, roughly early 1988 USA model year production (late 1987 calendar year production). This is also available new from the dealer, $458 USD list, ~$330 from discount dealers like MB Covington.
BTW, it will help if you specify the year and model of your car, or the production date if you live in a country that does not have model years like USA/Japan.