You are looking at early version tensioner, YES they do have 2 balls & springs!! But the only part that should be used doesn't use these balls & has only one spring~!! Just installed 1 in my 16v engine so am sure that only correct part is as described.

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MERCEDES BENZ MASTER GUILD TECHNICIAN (6 TIMES)
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 ITS RACECAR
1986 190E 16V