MBenzEnthusiast

Sorry for the ALL CAPS, but I’ve been seriously trying to find the part number for the m157 engine in my ML63 and I get so many contradictions as to what NGK spark plug do I need. Especially since I see that the spark plugs have to be indexed correctly. I’ve been the Weistec ones but I’m pretty sure I can find the NGK part number and get it for half the price. I do like the Weistec red crush washer on their spark plugs 😂 help please

jonUF02

There is actually a TSB stating NOT to use NGK plugs in the M157. Just go with the OEM Bosch plugs and torque them properly to index and not blow your engine.

MBenzEnthusiast

okay sounds like the plan. Thank you.