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Old 04-12-2004, 07:40 AM
jimbo23 jimbo23 is offline
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Join Date: Apr 2004
Posts: 2
Replacing E320 coupe battery (constant mains charge required?)

I have recently bought a 1996 MB E320 and need to replace the battery. This may seem like an odd question, but I have been told by a mechanic (admittedly, not an auto-electrician) that when changing the battery on these cars (with alarm and immobiliser) a constant charge should be fed to the terminals via a separate mains power source so as to avoid having a period of "zero power" in the system. "Downtime" has been known to cause problems with the ECU etc (apparently).

I am puzzled. Has anyone else heard of this, or should my mechanic go back to school?!?
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