[chiggsy]

Or, you'd make sure that your liability was limited to one year, absent of any servicing. Maybe you'd have a renewable service contract, yearly, and one of the requirements is local inspection.

>force the owner to get the train serviced.

This is coercion, implemented via subterfuge. It's no different than if they sent guys with sacks full of door handles or whatever to take control of the trains, to accomplish the same result. Or if the client hired staff to crack the provider's server, and either installed ransomware, or stole the solution. Ridiculous. The way to operate is through the laws in question, rather than removing agency from the client.

If the client does not want to pay, you warn them of possible consequences, ask them if they would like to purchase an extra diagnostics package, and remind them that after a year, maintenance of the product is required to bring you back into the picture formally.