DAF XF105 Engine Problem

I have a 510 105 with variouse intermittant and on going faults since new. Cruise Control will not always engage or stay in,when this happens i use variable limiter which apart from one time has always worked.This truck has now developed a new fault with a slight delay between throttle and engine response.This week it had its second Dowsing unit fitted,exactly 12 months after first replacement when 5 months old.
In my oppinion this is the most unrelible truck i have ever owned based on number of call outs and unschedueled repairs needed.
This is a shame as its performance and economy( 7.0 to 8.74 mpg)on bulk is great.I have run two FH 12s, an 95 400,an 95 530,anR112 333 and an R143 450 that i never had as much stress or problems with over the years as i have had with present 105.
Is there anybody else with problems with Cruise , Ad-Blu,Manual clutch wear/bite point,Low to high range lever shift loads and has any advice as i have less than 8 months warranty left. :frowning: :frowning: