In the end I got brave and took the bumper off!

[Audax]

Underbonnet is now as good as it's going to get.  All the black flat surfaces that were easily accessible have been wiped with an oily rag. 

Best kind of rag as it protects from rust  My 9-5 has developed a continuous body protection system in recent months....

[sgould]

I bought them from eBay.  The 9-5 doesn't monitor sidelights through canbus, apparently.

They were the ones recommended by phoenix.

http://www.ebay.co.uk/itm/250752327963  The yellow front end is a bit bright when up close.

[Mr Linear]

Did you get 4 bulbs? Will they also fit the number plate bulb holders?

[sgould]

I did get four bulbs.  I haven't tried fitting the others anywhere (yet!)  Too much to do before the International weekend.....