Is this normal? It's a good thing I had a window down when I was testing my duo valve as it would have locked me out. None of my pre-94 W124's lock themselves like this...

I also notice the air pump runs for about 10 seconds after the key is switched off.

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'88 300TE, 175k, black RENNTech 3.6L Recaro C's AMG 1 SOLD
'92 500E, 110k, Spruce green, stock SOLD
'94 E320 Cabriolet, 130k, E500 wheels, Emerald green SOLD
'94 E320 Cabriolet, 110k, black, stock, SOLD
'88 300TE, 229k, dark grey, SOLD
'90 300CE, 212k, white, new paint, SOLD
'91 300E, 209k, white, rebuilt head SOLD
'74 914-6, grey, 2.7L 325hp twin turbo Audi conversion

Has someone added keyless entry to it?
Gilly

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Click here to see the items I have up for auction at EBay

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If there is an aftermarket alarm or remote entry system then I would look into how it has been wired in.

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1989 300CE

You guys are brilliant or I'm a dolt...or both. I have an Alpine SEC-8447 key fob. The stock radio has a flashing light likely for the alarm and there's a mystery small momentary toggle switch in the cubby box. One more thing to fix or remove altogether...

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'88 300TE, 175k, black RENNTech 3.6L Recaro C's AMG 1 SOLD
'92 500E, 110k, Spruce green, stock SOLD
'94 E320 Cabriolet, 130k, E500 wheels, Emerald green SOLD
'94 E320 Cabriolet, 110k, black, stock, SOLD
'88 300TE, 229k, dark grey, SOLD
'90 300CE, 212k, white, new paint, SOLD
'91 300E, 209k, white, rebuilt head SOLD
'74 914-6, grey, 2.7L 325hp twin turbo Audi conversion