Originally Posted by: David Dewar 
As a matter of interest what is the warranty from Marklin if using another manufacturers control system with their locos etc.
Märklin Germany are not legally provided to give any warranty to customers who bought Märklin products from third parties. So they can limit their warranty in any way they like.
But they are legally required to fulfil the warranty as advertised. The warranty conditions can be found in the new items brochure.
AIUI you do not void the warranty of Märklin locos when you lube them with Fleischmann oil, or install Roco couplers, or drive them with an ECoS or Intellibox, or replace brushes as shown in the manual.
German professional dealers are legally required to give you two years of warranty (can be reduced to one year for second-hand items). Dealers can hardly get out of this warranty in the first six month unless they proof the customer made a mistake.
Originally Posted by: MaerklinLife 
You strike me as someone who would be more happy if you were a 2-railer, since the only thing you seem to buy from Märklin is the expensive track. Why not go for it and never look back?
I know this is a Märklin forum and anybody who dare criticise Märklin gets told to move to a Roco forum, a Piko forum, or an ESU forum.
I buy rolling stock from many different brands, including Märklin. I buy when I expect to get good value for my money.
Because I buy many different brands I know that
- Märklin is and was a reseller for many other brands and
- that some of Märklin's own products are just mediocre.
Because Märklin sold and sell many other brands in Märklin boxes, I'm amused when I read "I buy Märklin only".
I'm happy with my Märklin Central Station 60212 - and if it should fail one day I will probably buy an ECoS from the company that made the Märklin Central Station 60212.
How much Komtron is in the CS2? Who was the development partner for the CS3?
From my PC I'm used to industrial standards: I can buy CPU, motherboard, HDD, and DVD drive from different brands and they will work together.
MRR is less standardised, but e.g. decoder sockets and LocoNet (supported by my Central Station) allow some mixing.
If you want RailCom, RailCom+, or LocoNet then you can get it with an ECoS, but not with a CS2 or CS3.
OTOH there is no mfx+ with an ECoS.
Those who buy an ECoS can enjoy mfx+ with the PC version of the CS2 software.