I would like to download a copy of a canon eos 400d manual in eng

Try here:
http://thydzik.com/downloads/canon-service-manual-eos-kiss-digital-x-eos-digital-rebel-xti-eos-400d-digital.pdf

or other links/ideas maybe here:

http://thydzik.com/canon-service-manual-for-eos-kiss-digital-x-eos-digital-rebel-xti-eos-400d-digital/

The EOS 400d is called the Rebel XTi in some parts of the world. You can download the XTi manual and more from
http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/digital_rebel_xti#BrochuresAndManuals

You can download the manual for the 400D/XTi at
http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/digital_rebel_xti#BrochuresAndManuals

You can download the manual and more from
http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/eos_60d#BrochuresAndManuals

This is the same camera as the Rebel XTi. You can download a variety of manuals from the manufacturer's web site at
http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/digital_rebel_xti#BrochuresAndManuals

Manuals for the camera and all software supplied is here:

http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=DownloadDetailTabAct&fcategoryid=314&modelid=14256

The manual for the camera itself is the last one listed, titled:
"EOS DIGITAL REBEL XTi / EOS 400D DIGITAL Instruction Manual "

Copy and paste this address into your browser to download a copy to your computer. http://www.retrevo.com/support/Canon-400D-Digital-Cameras-manual/id/564dj483/t/2/

Here you go check this page out it has all the manuals for your camera
http://www.retrevo.com/support/Canon-400D-Digital-Cameras-manual/id/564dj483/t/2/

Hope this helps

the 400d manual is here, I think that's the "kiss":
http://oregonstate.edu/is/mediaservices/sms/sites/default/files/Canon_Rebel_XTi.pdf

but it seems the 350d is called 'kiss' too.
http://gdlp01.c-wss.com/gds/0900000278/EOSDRXT350DIM-EN.pdf

Helpful page for all canon eos manuals etc:
http://eosdoc.com/manuals/

Good luck!

heres a pdf file one http://oregonstate.edu/is/mediaservices/sms/sites/default/files/Canon_Rebel_XTi.pdf