04 Vito Van Central Locking - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 07-21-2011, 07:47 AM Thread Starter
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04 Vito Van Central Locking

I've just fitted a towbar with a 7-way by-pass relay to my 2004 Vito Van. During the process of determining the wire colours to tap into for the relay I found that the brake lights were permanently on and the battery had been drained to a level that caused the computer to go into various error conditions.

Only by charging the battery while removed from the vehicle was I able to get it to charge at all and following replacement all the error codes disappeared and warning lights took on a normal status.

I now find however, that although all doors will lock using either the key fob or dashboard switch, only the driver and passenger doors will unlock using either, rear doors and sliding doors have to be unlocked manually

Anyone have any experience of this or any ideas.
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