My 1986 300E allarm will sometimes activate when I use the driver's door key and open the door, I then have to re-insert the key in either the trunk or the passenger to de-activate te alarm and then enter, it is random but can be done if you are fast when opening the door with the key and pulling the handle open, does anyone know of a timing adjustment or how to fix this ? I can deal with it but I have lent the car to family and gotten a call with the horn blaring as they try to use the ignition to de activate and go nuts

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles

anyone ? still having the problem

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles

The best way to fix these alarms is to unplug them

in passenger footwell- black box- two plugs. Unplug.

There is also a RED 12 pin connector down there (on right side)- that is the SRS system!

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

Jerry, great patience. You can always disable the alarm control unit, which is what most people do. The systems just get old and frail. Should be under the passenger front floor mat.

Factory Alarm System Issues
http://www.peachparts.com/shopforum/diesel-discussion/150748-factory-alarm-system-issues.html#post1143583













Have a great day.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

i just unlock our 260e at the trunk

even if i unplugged the alarm...wouldn't lights flash?

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1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]

I ahd the same problem, on 2 MB's unplug the alarm module 2 plugs and the problem is over, I don't think anyone will break ionto these old cars anyways. That is unless you leave expensive stuff laying around, the old system is that. OLD.

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Thanks, Juan

Wish I could be more helpful regarding your issue. I have the opposite situation, if I unlock my 300E using the key in the trunk lock the alarm sometimes goes off. If I need access to the trunk with the doors locked I have learned to unlock the car at the door first.

__________________
'86 300E 5 speed
'71 Triumph TR6
'46 Cushman Scooter
'41 Ford 9N tractor