I'm doing some work on a friend's 98 ML320 with 95K and have a few questions relating to the fuel filter and O2 sensor.

I'm shopping for parts and need to know what chassis number applies to this vehicle, i.e., -A-289559, -X-745619, A-289560-, X-754620-. How would I go about finding this information?

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95 E320 Cabriolet, 169K