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      05-31-2011, 08:14 PM   #6
brandobot
Second Lieutenant
United_States
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Drives: 06 Z4M
Join Date: Jul 2010
Location: Bay Area Ca

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Quote:
Originally Posted by Finnegan View Post
Might very well be the battery has enough power to crank, but not enough to start. Others have reported the same issue with a battery on its last legs. Only way to know is to check the voltage, but if it's an 06 with original battery you're probably on borrowed time. Search on battery as there are AGM replacements cheaper than BWW. Here's one of the many threads on batteries to start off with. <Thread>
This happened after I replaced the battery with a new interstate battery h6 (which is suppose to be a direct replacement) When I got the new battery, I put it on a battery tender and trickle charged it for about 3 hours before installing.

Also, just to add. The car would crank for over 5 seconds and not start. Gave it a few seconds rest, tried again, and it fired up after two cranks.
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