I getting close to deciding on a CLS from Mercs Approved Used network. Question is other than negotiate a price, what else is worth asking for. My thoughts so far in order of preference. Comand map update (car 2010) Discount on a set of winter wheels and tyres (Merc £2200, Alloywheels Direct and My Tyres £1500) Next service depending on req'mt. Additional tier 1 warranty I'm looking to px my C220, and then paying the difference in cash. Can dealers get any of the above cheap enough to offer either free or low cost, or should I just get more money off?