new to mercedes could use some help

[kcpets]

hello everyone,
I am about to be a first time mercedes owner. I am trading my jeep xj for a 1988 Mercedes 190E 2.3 in great shape. What a cool looking car and from what i've seen they sure can be fun to drive. Anywayhere is the problem he drove the merc for 8 months no problems what so ever and then one day it wouldn't start and he doesn't know about mechanics so heleft it alone ..... from the information he told me and that i posted it sounded like a cps sensor, would this be a good place to start ? how much is a new cps (i'm in bc, canada) ? where exactly is it located ? i have done these changes many times on jeeps but never a car and again i'm new to mercedes. also is there anything else i should look at ? any advice on these mercs would be helpfull. is there anywhere to buy performance parts ? any good parts places in canada ? thanks again everyone and i look forward to owning a mercedes.