The driver's side door lock does not respond to my remote key. The lock works just fine otherwise. I thought maybe the batteries were bad so I replaced them but it still doesn't work. The remote does work on the trunk and windshield locks just fine so the problem must be with the lock itself. Just before it quite working it I started having an occassional problem. That's why I thought it might be the battery. Now it never works. Any insight would be greatly appreciated.

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dtimmester
1997 E300D
1992 300D Timing Chain Broke
1983 300D Sold
1982 380 SL Sold
1988 Porsche 911 Targa
1987 Porsche 911 w 1974 RSR Conversion

The "central locking" system is vacuum/pressure operated.

Since only that 1 door isn't working diagnosis would start with that door & vacuum loss.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
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44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

The vacum system is fine. The door will lock and unlock. It's the remote that will not work on the drivers door. Any ideas?

Thanks, dtimmester

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dtimmester
1997 E300D
1992 300D Timing Chain Broke
1983 300D Sold
1982 380 SL Sold
1988 Porsche 911 Targa
1987 Porsche 911 w 1974 RSR Conversion