Car is a 1991 300E. I've done a search and only found one thread that vaguely referenced slots near the latches on the rear doors. Supposedly you insert something in there, like your key, to activate the child safety feature. But I tried it and can't get anything to happen. Do I have to pry or something?

My manual says absolutely nothing about child safety locks.

Can anyone help? I seriously thought MBZ would have put this feature into their cars since they've always seemed to be pretty ahead of the pack in terms of safety features. Thanks in advance!

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

The security lever is in the rear doors above the main lock latch. Push it up to engage.
There should be a switch on the centre console next to the window switches. It has a icon of a 'child'. Slide it over to the right to engage the window lock.
There- child proof!

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1993 320TE M104
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past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
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"music and women I cannot but give way to, whatever my business" -Pepys

I'll have to look again, but I'm pretty sure I didn't see a lever - just a long slot. Maybe the lever is inside the slot? As I said, I inserted my key into it and "felt" around looking for some sort of lever or button to push and found nothing. I'll check again and report back.

Where in London are you? I visit my sister in Chelsea on average once or twice a year. She lives somewhere between Kings Rd. and South Ken tube stop. I will probably go again for a visit this summer.

__________________
08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

The slot is pretty small and the switch is inside it. It should slide up.

I'm in Richmond in south west London- bloody expensive but nice feel to it, kinda like Chelsea

How's Texas? My American wife's parents want to move there from NJ. I dated a texan girl once- redhead and pretty mad- but fun

__________________
1993 320TE M104
---------------------------------------------------
past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
----------------------------------------------
"music and women I cannot but give way to, whatever my business" -Pepys