I checked mine at full operational temperature after about 15 miles.
I did this because I was in city traffic jam for 30 mins and I noticed reluctance to come out of first for age’s afterwards after getting to the outskirts of the city. Then I noticed warning light on dash “engine coolant level low”.
As I had already picked up my daughter and her boyfriend for dinner I pressed on as I was late.
The coolant warning went on and off… after reaching my destination I left her and then checked the water level.. didn’t seem that low so I topped it up with a pint of mineral water from the restaurant.
No more warning light.
This morning I got the engine and box up to temperature and used the dipstick- she was registering at just below the max scale of the 80 degree.
Oil looked fine.
I’m thinking the oil got really hot and stressed the electrical connector again… it happened in summer’21 so may well be soft.
Does anyone have a different opinion?
does the oil level look low and need topping up, if so how much should I fill through the dipper pipe?

I’m tempted to just try and get a new seal for it and ask my mechanic to fit it.. then top up.

 

What trans fluid are you using.
Are you confident that your oil is at 80c as it takes awhile for the trans to get to this temperature. You mght be overful.
I use the 40c level and a temp gun

 

I’m using Esso / Mobil LT71141
im not sure if she needs topping up or not, the fact that she was very reluctant to change up after that very long jam in traffic concerns me.
I only say that as years ago when I was young I had a ford Sierra 2.3 ghia auto and the same thing happened until my dad told me to check the auto fluid, which when I did she was on the lowest point. I’m not sure if I should put a couple of fl oz in to this one that’s all.
cheers

 

Unless sure about where the ATF level currently is, I wouldn't just pour in additional fluid. The Jaguar Workshop Manual warns that any excess of ATF "MUST" be removed. This is because if overfilled, the ATF will start foaming (being turned into a "milkshake" by the rotating parts) which will cause drop of the fluid pressure, malfunction of the transmission and possible damage.

You said that the level was "just below the max scale" but I see that it is just below the "min" mark applicable for 80C. Before you can be certain where the level is, make sure that the dipstick is fully inserted when taking the reading. Otherwise it will show you low level when it actually may be overfilled. On my transmission (Daimler Super V8), it would look like the dipstick reached the bottom at about 1 or 2 inches before actual fully in. Wiggling the dipstick and pulling it back a bit than in again would overcome this last resistance.

You can make a mark on the dipstick at 704 mm from its tip and see where it is after you have inserted it. According to the measurement I made on my transmission, the 704 mm mark aligns with the top of the tube when the dipstick is fully in.

 

ESSO 71141 is NOT the correct fluid for the 722.6 Mercedes gearbox. (W5A580)

 

I took advice from xalty’s post 09/07/2021 and several others that Esso LT71141 is the appropriate ATF. What should it be then if that’s incorrect?
cheers

 

722.6 / W5A 580 / NAG1 calls for ATF 134.

Lots of companies list compatible fluids.

I needed fluid for a W5A580 Jaguar XKR so I ran up to the Daimler/Chrysler dealer and got some NAG1 fluid. (New Automatic Gearbox 1)
Mercedes sells their product and Shell, FEBI, Ravanol etc. all make a fluid for the 722.6 gearbox.

 

Esso / Mobil LT71141 satisfies the MB approval "Sheet 236.11" which is for ZF 4 HP-20 (see at https://operatingfluids.mercedes-benz.com/). For MB 722.6, the old approval was 236.10 but now it is 236.14 (both can be used).

236.10:
MB 236.10 ATF A 001 989 21 03 Daimler AG
Shell ATF 3403-M 115

236.14:
MB 236.14 ATF A 001 989 68 03 Daimler AG
Mobil ATF 134
Shell ATF134
Fuchs TITAN ATF 4134
Fuchs TITAN EG ATF 134

 

Esso ATF LT1141 is the correct fluid for normally aspirated.