Additional heating -webasto DS7, Diesel

Hello,
Anyone having a diesel ds7 and fitted with additional heating as standard? I have on mine but from the time i get it it’s not starting. No errors in diag, just not coming on while starting via remote..

New Varta AGM battery, fuel at max,etc

I see hybrids are able to control via app, but in my case i have only remote..

Anyone had any experience or have an idea what to try?