Jack, the OE number is 000-070-15-62 & has a list of $336.
Try partsshop as they sell bosch OE parts! Most US cars required much leaner mixture durning warm-up and so stay away from them if you can!

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MERCEDES Benz Master Guild Technician (6 TIMES)
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1986 190E 2.3 16V 2.5 (sold)
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