BMW Total Damage / How does the billing take place ?

Vehicle BMW E 36. Accident without fault. Opposite insurance the HUK. Reviewer was commissioned by me. Damage with VAT. = 5200 EUR. Replacement value = 4000 EUR. Remaining value = 850 EUR. HUK paid so far = 3150 EUR ( 4000 – 850 ) car already sold privately for 1500 EUR. Do I still have a claim to usage loss ? Car rental I did not take. According to the reviewer, I have 43,- EUR per day for 14 days. Should therefore still 602 EUR be open ??