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I'm unable to find reservoir for q7 2018 2.0T under the hood. My car has 50k plus miles thus far and I was thinking, I should look at the condition of hydraulic fluid but I'm unable to locate the reservoir. What I'm missing ? Can someone please help ?

'10Q7TDI_Prestige'

You've got a MK II, 4M chassis Q7, so that's the forum you need to be looking in/asking questions of...that's a clean-sheet redesign and not similar to the 4L Q7 in this forum. Your owner's manual should be able to show you where to find it on your engine, or you could 'google' it.

You are correct that you should check the hydraulic fluid condition, as if it is dark colored...needs changing; the stink of hydraulic fluid is just how it comes out of the bottle, but fresh fluid is light in color. Be careful not to confuse the brake master cylinder/reservoir with the hydraulic fluid reservoir. They will be labeled. They don't use same fluid.