I have purchased MBZ part A163 540 00 35, updated wiring harness for the AC Aux Fans, which provides for a 40 amp fuse vs. the original 30 amp. It's obvious where the harness plugs in near the fans, but not so obvious where the harness connects to power and ground.

What is the correct way to get access into the electrical system to make these two connections?

Thank you--Jim Herold

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Jim Herold--Current: 1987 190E 16V, 1999 ML 430--Past: 1971 280 SL, 1972 250