Automatic transmission fluid colour

[surebet]

I have just checked my ATF level, I was expecting colour to be red or black, I was quite surprised to see it was a yellow colour( like fresh engine oil), is this normal or does Mercedes use this colour of ATF. It certainly looks very clean, no traces of black.

 

[grober]

The main thing to check is whether its clear/translucent [ no suspended solids} more than the colour. It possibly means a non MB fluid has been used but if it meets the correct spec then nothing to worry about. I have a vague feeling the Febi stuff may be yellow but can't be certain.

 

[surebet]

The main thing to check is whether its clear/translucent [ no suspended solids} more than the colour. It possibly means a non MB fluid has been used but if it meets the correct spec then nothing to worry about. I have a vague feeling the Febi stuff may be yellow but can't be certain.

It definately is MB fluid as it is original fluid.

 

[Terry_]

Febi fluid is red

 

[horgantrevor]

mb fluid is also red

i would get it checked if you are worried

 

[oldmerc]

It could be engine oil supplied in your transmission...i work for a Mobile Crane Hire Company who mainly run Liebherr and Demag Cranes..mostly fitted with ZF or Allison type transmissions..depending on working conditions/climate 15/40 engine oil or Dextron ATF may be used..on no account these oils should ever be mixed.

 

[Triv]

I dipped my autobox the other day using the curtain wire method and it too contains perfectly clear, bright yellow fluid, to the correct level.
I have an invoice in the car's history, from the main dealer in 2006, for a gearbox oil and filter change, yet everyone I speak to, including the same main dealer, says the fluid should be red.
Does anyone know the definitive answer as to what the yellow fluid is?

 

[kth286]

I dipped my autobox the other day using the curtain wire method and it too contains perfectly clear, bright yellow fluid, to the correct level.
I have an invoice in the car's history, from the main dealer in 2006, for a gearbox oil and filter change, yet everyone I speak to, including the same main dealer, says the fluid should be red.
Does anyone know the definitive answer as to what the yellow fluid is?

antifreeze contamination ?

mix some together and see if it goes yellow.

 

[BlackC55]

Old ATF turns yellow and does not take long to do it. I believe it it contaminated by the friction plates. The only way to get it red again is to change it a few times over a few miles.

I would not worry too much as it is quite normal. My suggestion is to change the ATF every 40k