Trebor

Tried to change diff fluid in my 2006 A6. Expected a 3/8 inch plug. Did not fit. So I tried a T55 TORX and it fits. I don't want to wreck the plugs by twisting a T55 inside the plugs if this is wrong. Can someone confirm I am right?

Thanks,

Bob

da6speed

I think it's a 10mm Allen.

timd38

I think you are right.