litle advice :
Received my Rigol and in the same minute I connect it to mains , inserted DSER option and everything went fine. Some play arround with scope realised it had a problem at Channel A , input allways have some posite offset, any way .. returned it to Rigol to a waranty repair ... 2 days after they said scope has been hacked and no warranty for this cases .
Assuming that the scope was bought from a dealer in the European Union, and that you bought as a consumer (and not a business), you should ask for a refund on that repair cost:
The European Community directive on guarantees (1999/44/EC) says that for any fault that occurs within the first 6 months after purchase, the fault is presumed to have existed at the time of manufacturing, unless proven otherwise. I. e. the seller needs to
prove that you have caused the fault (e.g. by hacking the scope -- that can't be the case, as a regular upgrade would not do any damage either), or repair it under the compulsory guarantee.
This changes only after six months (and until the end of the 24 month guarantee period). Then the seller can ask you to prove that a fault has already existed upon delivery of the instrument, which may be hard to do. In my experience, most dealers don't force an argument -- unless goods are e.g. damaged from the outside, hacked or something ;-)
I am pretty sure that the national laws on guarantees reflect this directive in all EU member states. The German law certainly does.