What is a reliable way to determine the engine number in your car? I have a 1987 260E but it has the original engine replaced with a used one so I can't go by the VIN to get the engine number. Is there a way I can read it off the engine block somewhere? It should be stamped somewhere right? For all I know it might not even be a 2.6L liter in there, could be a 3.0L as the two are almost the same size. Thx

Hi,
I have a '87 300E. The engine number is stamped into a flat place on the block on the passenger side. It is towards the front of the engine and low down. You might need to clean the engine to see it.
Anziani

'87 300E 180K
'95 420E 103K