AS MB wires are solid core they should have a 1-2 ohm reading. the end that connects to the spark plug is the resistor, it should have 1,2 or 5K markings.

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