Directions to The Westin Grande Sukhumvit Hotel,

From BTS Skytrain (www.bts.co.th)
Sukhumvit Line (Mo Chit- On Nut): Asok Station (E4)—Take Exit 5

See www.bts.co.th/th/stationMap.asp?s=E4_Update for more details

From Bangkok Metro (Underground) or MRT (www.bangkokmetro.co.th)
Blue Line: Sukhumvit Station (Take Exit 3)

Download Directions here.