That is most likely valve lifter noise, fist thing you can try is to change your oils and use an additive like Lucas Oil stabilizer, engines become loose as they age and weak oil can cause issues with lifters.
If you get no relief from theol change you may need to look into some valve work.
The 2014 Volkswagen Golf's engine produces 177 ft-lbs. @ 4250 rpm.
The 2012 Volkswagen Golf's engine produces 177 ft-lbs. @ 4250 rpm.
The 2005 Volkswagen Jetta's engine produces 122 ft-lbs. @ 2600 rpm.
The 2003 Volkswagen Golf's engine produces 122 ft-lbs. @ 2600 rpm.
The 2011 Volkswagen Tiguan's engine produces 207 ft-lbs. @ 1700 rpm.
The 2003 Volkswagen Passat's engine produces 166 ft-lbs. @ 1950 rpm.
The 2012 Volkswagen Eos's engine produces 207 ft-lbs. @ 1800 rpm.
The 2012 Volkswagen Passat's engine produces 177 ft-lbs. @ 4250 rpm.
The 2009 Volkswagen Tiguan's engine produces 206 ft-lbs. @ 1700 rpm.
The 2009 Volkswagen CC's engine produces 207 ft-lbs. @ 1700 rpm.
The 2009 Volkswagen Eos's engine produces 207 ft-lbs. @ 1800 rpm.
The 2012 Volkswagen Jetta's engine produces 125 ft-lbs. @ 4000 rpm.