A friend of mine who owns a service and repair facility near by has a client with a peculiar problem. The car is a 91 190E 2.3. With no rhyme or reason the battery goes dead every 3 to 4 to 5 weeks. The shop has tested key off drains and everything else. They even changed the alternator as a possible intermittent problem. After the battery is recharged, there is no problem until the next dead battery which may be several weeks down the road. Any one seen this or have any profound thoughts. There are 3 drivers who share the car and know how to connect the battery booster that's kept in the trunk,so please no posts about someone leaving the lights on or dirty battery terminals or something like that. This has been going on for about a year. I'm hoping someone else has experienced this anomoly.

Thanks,
Peter

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