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Old 08-10-2006, 09:41 PM
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96C220 96C220 is offline
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Join Date: May 2001
Location: Hamilton, NJ
Posts: 367
From my understanding, they are two separate systems.

The key uses radio frequency for lock / unlock. Infrared is used for the convenience window / sunroof opening and closing.

Have you noticed the range on your locking / unlocking has decreased?

The key has two separate transmission systems in it, and infrared uses much less power, therefore a weak battery would affect the infrared system before it affected the radio frequency unlocking.

You may want to change the battery in your key. I had a key that barely worked and $6 in batteries from radio shack made it brand new.

There is a section in your owners manual about it.

Take care,

George Androulakis

Former Mb's:

1990 500sl R129 - 76k Original Miles - New project - Follow the saga
1990 190E 2.6 148k mi (sold)
1989 420 SEL 246k mi (sold)
1995 C220 175k mi (sold)
1992 190e 2.6 74k original miles (sold)
2000 c230 Kompressor 122k miles (RIP)
1996 C220 149k mi (sold)
2000 C230 Kompressor Sport 127k (sold)

Current Cars:

2009 Mercedes c300 4matic
2006 Mercedes s430
2005 Jaguar XJR
2003 Cadillac Escalade
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