New vehicle V 70 LPG What do I do with the 850?

Hello friends, A new companion has found to us: a V70 from 2005, 140 hp, automatic, 235 000 km, new Zavoli gas system installed 80l tank, ZR new, oils changed etc. ; fun! But now here is the old Bolide and here I need your advice: 850 from 95, 144 hp, automatic, 562 000 km. We have driven this one year and 20000 km actually only long distance … first of all the good sides: Tüv 4/22 engine and gearbox run flawlessly, powerful and soft switching exhaust system up to Kat new 3/21 new light engine 10/21 new axle front left 10/21 The previous owners (one family) have renewed: driver door, rear flap, engine hood Now the difficulties: Vorkat does not function, therefore loud and the engine inspection light burns therefore stone blow in the front window and for us the most difficult: Thanks to the front left the wheel holder is rusted off and let itself be snowy because of lack of mass.