How to check for hydraulic oil level in an Audi A2?

I've noticed some changes in my car's handling and think it might be due to low hydraulic oil level. How do I check and refill the oil in an Audi A2?

First, locate the hydraulic reservoir near the engine. It should have a yellow cap and a dipstick attached to it. Pull out the dipstick and wipe it clean, then reinsert it fully and pull it out again to check the oil level. If it's below the minimum mark, add more oil as recommended in your owner's manual.