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#1
05-16-2009, 07:31 PM
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Doors unlock when hitting bumps
I have a 98 SL500 and the doors will unlock when I hit a fairly hard bump (like a really bad expansion joint). Doesn't happen on normal bumps, but only on the ones that you think "wish I'd missed that one". Once they're unlocked, they won't relock until you turn the ignition completely off, remove the key, put the key back in and turn until the dash lights come on...at that point they are back to working normally. Any ideas?
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2manycars 02 ML320 (SOLD) 98 SL500 03 E320 89 260E 75 450SL 98 Chev Silverado K1500 (SOLD) 02 Chev Avalanche 2500 05 Harley Davidson Ultra Classic 02 27' Toy Hauler 
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#2
05-16-2009, 07:36 PM
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Perhaps the shock of hitting a bump is jarring a relay or control module/plug loose somewhere? And it reboots it when restarting the car? That is my best guess....
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#3
05-19-2009, 12:13 AM
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Not sure... unfortunately, I am a fanatic when it comes to missing rough pavement and thankfully around here, the roads are fairly good.
Sounds like Pawo is onto something... sounds like something is loose, jarring.
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#4
05-19-2009, 08:09 AM
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Could be a door contact switch.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 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
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#5
05-20-2009, 08:40 PM
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Thanks all...I'll start with the door switch I think and go from there. I forgot to say that there is always a consistent delay of about ten seconds from the time I hit the bump until the doors unlock. I thought maybe there was something to automatically unlock the doors a few seconds after an accident. Anyone think that might be a possibility and the shock of the bump is making it activate?
__________________
2manycars 02 ML320 (SOLD) 98 SL500 03 E320 89 260E 75 450SL 98 Chev Silverado K1500 (SOLD) 02 Chev Avalanche 2500 05 Harley Davidson Ultra Classic 02 27' Toy Hauler
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