IMHO, I've found the Bentley to be wrong on enough occasions that the Haynes is my primary manual of choice. The Haynes is available in PDF for free if you google it.
The Bentley is a good second resource for me, but then again, I have a laptop in the garage and just search e30tech or roadfly and 99% find the answer / walk through I'm looking for.
Just my $0.02 adjusted after inflation.