Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
There has been a service bulletin on the crankshaft position sensor. Here is what it states.
Date: January 22, 2002
Order No.: P-B-07.60/16
E-Class (All) with M112 (V6) and M113 (V8) Engine
S-Class (220.170/175, 215.375) with M113 (V8) Engine
Rough Idle / Rough Running / Hesitation / Engine Won't Start
On the above mentioned models, if you encounter conditions of rough idle, rough running, hesitation or engine won't start with the following possible engine codes P2034, P2050, P2051 P2052, P2053, P2054, P2055, P2056, P2057, P2058, is possible that there is moisture in the crankshaft position sensor plug leading to corrosion of the contact pin(s). Please perform the following procedure to resolve.
S-Class (220.170/175, 215.375)
C and E-Class: Harness production 7/01
S-Class: Harness production 11/01
Production date of the harness is located on the harness inside the module box.