Multiple warning messages per DSTC, Collision, Cruise contr
 

s80 2007 AWD 3.2 have multiple warnings which my mechanic and I can't seem to get rid of: DSTC service required; Collision Warning service required; Cruise Control service required; Also symbols showing : triangular stability one and the engine service one (latter appears sporadically). Latest major service: We just replaced all the rear wheel bearings.

A bad battery can give a full battery (!) of warnings.

Probably not relevant, but worth checking the cabling from the fuse box, connections into the ecu and earth connections for frayed or corroded wiring.
Not just spraying wd40, but looking where damp might have crept in.

I'd be looking at rear wheel speed sensors. Have you had all the codes read fully?