Off hand I can't remember. I just remember when replacing the radio in my '83 TD, I saw a relay in that area and when you use the turn signals or hazards, you here the clicking sound from there.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member