Need help fast!

Hello to everyone. I am planning on going to test drive vehicles tomorrow and I need to know some stuff before then if possible. I am in the field to buy a Mercedes of some type and I was looking at a 1998 ML320 4x4 that has 87,367 miles on it. The dealership is selling it for $15,000. I know that pretty much any Mercedes is very reliable, but I am still hesitant to purchase this vehicle with such high mileage. Do you guys think it would still be a safe bet to buy it, or should I try to go for another Merc with lower miles? I am also looking at a 2000 C230K and 98-99 C280's with much lower mileage, but I would really like to have the four wheel drive. Thanks for any replies!

Seth

My 1998 M320 has 120,000 miles and drives like new. 

check out and confirm the reviews at www.edmunds.com