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Old 10-02-2002, 11:43 AM
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G-Benz G-Benz is offline
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
Originally posted by JCE
BTW, that clear plastic tube vent line is for any hydrogen gas given off by the battery. Hydrogen gas can apparently be given off by an overcharging battery or one that gets too hot.
I'll vouch for that!!!

I don't have a vent line on the W124, but about a year ago, a failed voltage regulator caused my alternator to overcharge (measured 17.5 volts at the terminals!!), and I could see (and smell) the vapors being emitted from the battery!!! Pretty noxious too!
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
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