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I've been living with the start/stop for the last five years in my AU NA Foz's, no biggy, a slight adjustment of brake pressure keeps it from turning the engine off, definitely not a deal breaker for this little black duck when looking at the 2019 Foz :smile2:
 

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With the AUS Spec SJ NA 2.5 Forester, the Auto Start-Stop doesn't get disabled when the A/C is turned on. We have had a very hot Summer and a quick foot pressure adjustment on the brake pedal prevents the engine stopping which keeping the A/C doing it's thing, 5 years and counting no dramas for this little black duck :)
 
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Playing with the brake pedal is not a great option.
There is no "playing" with the brake pedal, your right foot never leaves the pedal, there is a very slight pressure release required to prevent the auto start stop from stopping the engine, the brakes are always fully engaged and the vehicle doesn't move. Once you get a test drive of the 2019 Forester you will be able to try this technique and appreciate how simple and more importantly safe it is.

Can anyone else chime in if the auto start/stop turns on even if the a/c is on? This would cause a significant drag on battery and systems I would think.
I'll chime in again and say again the Australian Spec. NA 2.5 SJ CVT Forester since February 2013 has been equipped as standard with the auto stop-start function, I have owned a MY13 (US MY14) and currently a MY15 (US MY16).
When the a/c is turned on it does NOT turn off or disable the auto start-stop in the Australian Spec. NA 2.5 SJ CVT Forester.
I don't know if the US market will get the same auto start-stop system as ours in the new 2019, time will tell.:smile2:

My comments are from over 5 years of physical driving experience with the auto start-stop system in the current Forester.:smile2:

I was very cautious of the auto start-stop system for the first 6 months in 2013, I carried a Jump Starter Battery all the time just in case the car battery died:smile2: all good so far, I regularly use a CTEK MXS5.0T Battery Charger to keep the car battery in good shape and pick up any issues with the battery ie. sulphation, before it becomes a drama.

BTW it is very rare for me not to have my a/c on all year round in this part of OZ - subtropical with many days over the last few years in Spring/Summer/Autumn with well over 100F and 80% + humidity.

I hope this clarifies some of your auto start-stop concerns

Cheers
Ian
 

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Auto Start Stop maybe new to the US market and the 2019 Forester but other markets have had the Auto Start Stop standard on the previous SJ Forester since January 2013.
The vehicle battery type for the Auto Start Stop is a Q85 here in Australia on the SJ Forester, the following video explains the Auto Start Stop in the impreza
5 plus years of driving a Auto Start Stop Forester, I've had no issues whats so ever with it.
 

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2021 Forester 2.5 Sports CVT, SI-Drive (S & I modes)
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No one, it is an exaggerated Subaru instructional video explaining in a methodical way how the auto start stop works in the older Gen. Impreza.

The US Spec. MY19 Forester User Manual - Page 339 is a good resource re. auto start stop system, it's worth the read:grin2:
https://techinfo.subaru.com/stis/doc/ownerManual/MSA5M1902C_STIS.pdf
 

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Have you guys seen in the 2019 manual that the auto stop/start may not work with the a/c on high or rear window defroster on, etc? WTH?!!?!?!
Yes I've seen it and experienced it over the last 5 plus years of driving a auto start stop Forester, the auto start stop doesn't concern me one little bit, the replacement costs of the eyesight genuine windscreens are more of a concern after 3 windscreens in the last 18 months on a non eyesight Forester. Thank goodness for insurance:grin2:

A hack for new players, when the engine turns off with the auto start stop, a very slight reduction of foot pressure on the brake pedal will restart the engine :grin2:
 

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Hi ianbne,

I see you've been through several Forester iterations since I joined. Still stuck with the diesel but hope to encourage an upgrade and the 2019 looks like a candidate.

My parents have an automatic Mazda 2 with stop/start. If you hold the car stopped with light brake pedal pressure, the engine will not stop (i.e. idles as per 'normal'). If you increase the brake pedal pressure slightly, the engine will then stop. I find it easy to modulate the Mazda 2 system with brake pressure and as a result I don't need to use the deactivate button unless I want to.

Does your Forester do this too?

Thanks,
Hi pitrack_1, I should have my 19 Forester some time this week but I can test my current SJ Forester's Start Stop tomorrow and see if I can apply light brake pressure and see it the Start Stop engages or not, my gut feeling is it will not and the engine will keep running the same as the Mazda's system. I'll have to force myself to lightly apply the brake pedal :grin2:
 

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Hi RidingWV, thanks for the info, I've been living with S/S in my current gen AUS Spec Foresters for over 5 years, I don't turn it off every time I drive I just release the brake pedal pressure slightly to restart the engine immediately after it shuts down :wink2:

I'll be testing a different technique of applying lighter brake pressure than I do currently when I brake and see if this prevents the S/S from shutting down, as this technique works in the AUS Spec Mazdas.

The technique of releasing the brake pedal pressure slightly to restart the engine worked in the AUS Spec Demo 2019 Forester I drove a couple of weeks ago the same way as it works in my current AUS MY15 Forester and my past AUS MY13.

Thanks again :smile2:
 

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Hi pitrack_1,

I can confirm your Mazda technique works with my MY15 Forester, light pressure and the Auto Start Stop doesn't engage, then you apply a little more pressure and it kicks in and the engine Stops :) I modified my technique by applying the normal pressure then release it a little and the Auto Start Stop doesn't engage :)

I'm confident that the MY19 will behave the same way, hopefully, I'll pick my 19 on Wednesday as the dealer has just installed the towbar today :frown2:, its the detachable euro swan neck design, thankfully if that doesn't cut the mustard at least Hayman Reese has just released a towbar for the new Forester that is fully compatible with all the new tech.

Thanks again for your advice on the modulating of the brake pedal, I'm looking forward to just applying the normal brake pressure and then just curling my big toe back releasing enough pressure to prevent the Auto Start Stop from engaging Wahooo! :grin2:

Cheers
Ian
 

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No probs mate, the Q85 Battery is getting more readily available, Subaru Australia recommends the Century Q85 as a replacement at $450 a pop they are not cheap :frown2:

Tomorrow is the delivery day for my new 19 Forester, an early start for a lazy 200km drive to my rural dealer, it's a small price to pay when I save over $6000 compared to the city dealers :grin2:

Photos and review coming tomorrow night :grin2:
 

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