hrmjay

Hi,
I'm running a 2002 e240 v6 which developed a random misfire with no codes. Replaced the spark plugs with no improvement. At the same time tested the coils.
Subsequently, did a smoke test and found leaks in the intake manifold, removal showed cracks and crazing.

My problem is finding the appropriate replacement. The manifold on the car has part number A1121401101.

By searching online I've found A1121401501 and A1121402101 replacements.

Are these interchangeable with the version on my car?

Any assistance towards identifying the proper one is greatly appreciated.

Roshan