First of all, I thought batteries were 13.2 V, not 12 V. I burned myself grounding my watch while working on an electrical system on a 68 model 6 years ago - got 3rd degree burns on my wrist and it got infected so do be very careful about taking off jewelry.
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'89 420 SEL
'90 300 SEL
'84 300 SD (sold it)
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