Auto stop/start when towing with an automatic

Does it mention anything about this in your handbook?

I tow with a VW Touareg and the handbook has a section on towing, it suggests there that the stop/start function should be turned off.

On both my current and previous Audi Q5, bought in 2013, the stop/start function is disabled automatically when towing.

Do you know why? I also tow with a Treg and don't bother turning it off unless I am at a difficult junction when it might be a nuisance.

I just turn my car's stop/start off when ever I get in it whether I'm towing or not.

I turn it off with our Disco when towing as I want to ensure the systems cooling, particularly the auto box's, gets every benefit it can. With the engine stopped so is the gearing's cooling.

I beleve the handbook also states doing so.

Like Mollys we tend in all our vehicles to switch it off when going out solo and only re switch it on when faced with traffic situation it offers us and the plannet any real benefit. Living in a rural area our driving rarely takes us into highly populated areas where it does much good. 

Your choice but why? particularly when not owing? You're just wasting fuel if your stop is longer than about 6 seconds, and of course adding to pollution.

Is that a fact?  There will be the fuel needed to restart the engine and bring it up to speed, plus the extra fuel to replenish the energy taken from the battery to restart.

Clearly there is a time span where one gains but what detailed research indicates this is 6 seconds? A serious question, having worked on diesel engine research and development.[ that, with turbo issues,  one where I am reticent to let SS jump in too readily right after a fast or highly loaded run]

I thought that C, ‘turning it off’, ‘ensure system cooling’, ‘gearing cooling’🤷🏻‍♂️. Why have something that is called automatic if the user needs to deactivate the auto part & render it manual🤔😕

Stop start technology is designed to be used in heavy urban traffic, to reduce fuel consumption and reduce emissions. We followed one car down motorway in heavy traffic and couldn’t understand why he was stopping rather than trickling along like the other lanes. Came to conclusion he was using stopstart, so there was a slight but irritating (to those of us behind him) pause every so often. We overtook him eventually along with others, left him to his high tech daydreaming.

You have to hope car designers have got the lubrication right in stopstart cars. Something designed to stop and start x thousands of times, is stopping 10 times x thousands of times instead, wearing on engine if lubricant and components aren’t right. Jury’s out on how much emissions they save overall.

when I did the sums and experiments (using both simple and differential equations with other factors) it was about between 6 and 7 seconds. Others doing the same got about the same answers. Not saying it was a fact and that was a long time ago now

Very simply from recall on the car we had used about 1.0 to 1.2 cc of fuel on start up, while idling used about 0.1 to 0.2 cc per second. Do the sums, this was based on a 1.6 litre petrol.

Various top gear programmes have shown the stop tart system saves does save fuel.

But as you say there are other factors involved and my car switches it off automatically when towing too but I was just asking why others switched their system off when not towing?