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CL55, CL500, S430, S500, S320L, 300SE, C250 CDI
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137 Posts

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1986/1990 W126
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17,658 Posts
Good ones can last ages. I always buy Bosch for that reason, but the one on my SE is one from a new 7 series Beemer that my boss bought to try and get to the bottom of electrical problems.
It wasn't the fix, so he gave it to me. (Yay!) It's a good few years old now, I'll have to check later...
 

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95,94,93 e320/300e
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490 Posts
I’d change it out. There’s a good chance it’ll leave you stranded somewhere one day
 

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1981 300SD, 1976 300D
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1,000 Posts
That’s getting up there, they last about 4 years tops in AZ desert heat.

My race car has an Optima red top that’s older, but it also has a kill switch (batteries last a while longer when they have no current draw)…
 
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