I have a 2011 Skoda Octavia 2 Ltr TDI diesel 140 bhp auto 194,000 miles and have just bought a 2015 Octavia 2 ltr 150bhp TDI diesel automatic, 31,000 miles. The engine on the 2015 model sounds a lot noisier and rattlier when pulling away in 1st and second gear. Is this because of a change in engine design between the two, or could there be a problem? The performance of the 2015 model is excellent and a bit quicker than my 2011 model, which of course it should be. Please advise. Thanks.Kevin.