[rikana]

What exactly is meant to happen or not happen when you engage anti tow???

 

[syljua]

The anti tow, is just a mode of the alarm to sound when the car is rocked/shaken/put under some kind of acceleration. The switch on the console can temporarily (valid until next lock/activation of alarm) turn off the anti tow. Convenient to do, when having your car on a ferry, and want to lock it.

The other end of the switch is temporarily turning off the IR compartment sensors. Convenient when locking car with small pet inside. (This IR can also be too sensitive to temp changes, so in many cases, I have had to disable it, when parking outdoors in cold climate at night).

br,
syljua

 

[MafiaDON]

What year of production was that feature introduced on the W140?

I don't think either of my S-Classes has that button / switch..

Does anyone have a pic of what it looks like?

 

[syljua]

Does anyone have a pic of what it looks like?

Heres mine:

br,
syljua

 

[600SEC95]

Hi, I wonder if there is more information about the anti tow button? I can't find anything in the instruction manual .. I've read some conflicting posts where one said it should blink red when activated .. and another post saying it's disabled when blinking red..
Syljua It was helpful to know that the button have TWO functions, I thought "off-off" was supposed to read on-off

 

[syljua]

Syljua It was helpful to know that the button have TWO functions, I thought "off-off" was supposed to read on-off

No, its off-off. The possibility to turn one or both functions (tow and/or IR compartment
sensors), before the next locking. So, its only possible to turn off functions for next lock.

Press the upper, and it will blink for some seconds, to indicate that its active (off),
press the lower, and it will light stead for a second or two, to indicate that its active (off).
(or visa-versa, do not remember exactly).

Once the car is locked, the alarm will be armed after a while (1. min?), and then
the led will light steadily (or blink?, have not looked..)

Bit off topic;

I used to turn these features off when parking outside at my parents house. I though at the time, that it
was the sensitivity of the IR in changing weather that triggered the alarm.

Later, I've come to the conclusion, that it was my faulty ESP yaw sensor, that would have a constant value on its signal, that would, by
the slightest touch go over the threshold value, letting the car thinking it was being rocked from side to side.
Since then, I've replaced the yaw sensor, and have not had a false alarm triggering (though lately, my EPS has been kicking
in when turning right in a downhill acceleration situation, so it might have to be replaced again).

Reading back in 2014;

Reading now in 2017;

I guess, on a stationary car, both the yaw and the lateral acceleration sensor should
read 0.0 ˚/s and 0.0 m/sˆ2 respectively?

br,
syljua

 

[600SEC95]

Thanks for clarification , so the anti-tow and interior IR protection activates next time the car is locked. I want all the protection available when parking the car.
Unfortunately I don't know anything about those sensors .. I don't have OBD support to view sensor values in my car..

 

[anziani]

Is this an European extra? I've never seen this switch on any of the Mercedes I've owned.
Anziani

 

[Thom_7]

I had it on my 1999 SLK, so I guess they were including them around that era.

The way the dealer explained it to me when I bought the car was that if your car needed to be towed for any reason, you pushed the switch and it would keep the alarm from going off and draining your battery. I remember the instruction manual saying something similar.

Conversely, if someone tried to tow the car without your permission the alarm would sound.

 

[syljua]

Is this an European extra?

Yes, I think so. The code is;
882 INTERIOR SAFEGUARD/TOWING PROTECTION
and it was first available in June 1994.

From www.mb-w140.de;

06.1994
Bei Fahrzeugen mit der Sonderausstattung "IR-Innenraumabsicherung" gehört als zusätzliche Diebstahlsicherung ein Abschleppschutz, der bei Neigungsänderungen Alarm auslöst.

I cannot find any reference to it in the US brochures here;
W140

br,
syljua