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Registered
1992 500SL
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32 Posts
Discussion Starter #1
The locking system on my 1992 500SL just stopped working. The lights on the door and trunk still work, however the only way to lock and unlock the doors is with the key. The key will only open the one door, not both. The internal locks are not working either. When I use the remote, the red light stays on for quite some time before going out and I hear a buzzing noise coming from the battery compartment in the trunk.... any ideas???
 

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Registered
1992 500SL
Joined
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32 Posts
Discussion Starter #4
I'll check out the vacuum pump... that's exactly where the buzzing is coming from! Thanks!
 

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Registered
1992 500SL
Joined
·
32 Posts
Discussion Starter #5
Had to replace the vacuum pump... not too difficult to do. Locking system works perfectly again!
 

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Registered
2006 SL500
Joined
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144 Posts
If you wouldn't mind, please post some instructions. I would like to know how to fix this if it ever happens to me.

Thanks!
 
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