On the 2.2 '06 on, you can fill the gearbox through the breather on top of the gearbox from inside the bonnet, pull of the plastic cover. You will need a small funnel to fit into the hole under the plastic cover. Use the 1 litre bottles with a tube. Fix another tube onto the bottle, 50cm should be enough, then just poor into the funnel. It take about 2.7 litres. Use 75w 80w Hope this helps.
john
June 2015
no jack or stands required crawl under van with a small 11mm socket or spanner remove reverseing light switch pull out cog fill up threw hole !
drain plug directly under gearbox were your working if total gearbox oil change required fill up till it poors out 2 litres hope thats explanitry enough regards cj
cj
April 2013
went into my local citroen dealer, weddington rd, nuneaton. they did me a couple of print-outs showing drain and fill plugs location and oil spec. no charge and very helpful. On these vans water sits on top of gearbox and goes in through breather knackering syncro. Think 1.8l for early and 2.2 for later 1.9s, both EP80/90, but check of course. Cheers.
robbie7
March 2011
i dont think they have one because all the garages i asked dont know. this means you have to go into a garage and oopsie you need a new clutch at £450 plus expert labour
bill t
May 2010
I can answer this question...
where are the gearbox drain and fill plugs for a citroen relay?