Looking at this for problems after garage replaced the battery, now the srs w/l is stays on and the heated rear window and heated mirrors have packed up.
Checked that all the fuses are ok, fault code in the SRS is B1557=Control unit(Active) which won't clear,
also 3 faults in ETACS the don't clear

U1504=RLS Lin Timeout/Not Equipped (Active)
U1101=T/M Can Timeout/Not Equipped (Active)
U1111=Display Can Timeout/Not Equipped (Active)

Went into A/C Heating system and it shows that the HRW switch is ok, also in activations i can turn the switch on and off but nothing being powered up, the fuse for the heated mirrors stays dead, this fuse board above the pedals also has 4 x small black relays at the front (the ones that you can't pull out easily) but can't find any info to what they are for. Any Help Appreciated.

Hello Steve,
Not overly familiar with this age of L200

But have you checked for any fusable links coming off the Battery? Or spade connectors dislodged! (This set-up is popular with Mitsubishi)
Especially as you said the fault accured after a battery swap.

Ian