Sorry but that is NOT an OEM part and you know as well as I do that these cars are VERY finicky when it comes to cheap aftermarket sensors. Save yourself the $10, the time it'll take to remove and replace it twice and the headache of not knowing if that was really the problem the first time and just get an OEM crank senor from the start.

MB part number is A 003 153 27 28 and they are anywhere from $80-150 at the dealer which is a rip-off and they can be found cheaper but are still OEM. I'm not endorsing these guys but I have dealt with them in the past and they have the OEM sensors for $45 with free shipping.

GermanAutoSupply - Mercedes-Benz Crankshaft Position Sensor - BOSCH - 0261210170 - NEW OEM MB Crank