You DON'T ned to remove the downpipe, its a fiddle, but it'll come out without. I've removed two starters off 200's and never taken the downpipe off. There is 3 bolts as far as I remember, or 2 bolts and a stud with a nut. 2 on the bottow, one on the top, engine side I think. Take these off and you should slide the starter out. There is a cable tie holding a wire on which goes round the starter and round somewhere else, you'll need to cut that off (assuming the starter hasn't been removed before). It catches alot of people out, myself included (not twice though
) as you can't pull the starter out without cutting it off! Don't bother putting it back on, its not needed. Its a landrover trick to make the job more difficult. I think the designers used to take bets on who could put the most akward things in the most akward places
After you slide the starter off, theres just enough room to get it facing up. If you've got a mate to help you, that would be better. Grab the starter from the top and you need to twist it and turn it round past the downpipe and various other obsticles, but its possible.
Cheers, Ben