Class a - noise when throttling in cold start

[javidr]

Hi

I am planning to buy a class a (200 cdi 1.8) but i moticed something worrying while doing the test drive

When throttling in cold conditions there was a metallic noise. It could be the exhaust imo

The dealer agreed to check and fix it

Has anybody experienced that noise, or could help to find out what it is?

Thanks