I purchased a glow plug from a dealer and it was made by Beru with star on it.

In past, when vehicles were first introduced, there was some confusion on the part number and the wrong Bosch was installed. There is a service bulletin that allowed dealers to replace the plugs if this happened.

I am not sure Bosch makes a 5v plug for the OM648 engine.

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-- Chris

'95 E300, 216k miles, Silver Surfer
'05 E320 CDI, 138k miles
'07 S550 4matic, 69k miles

Gone but not forgotten:

'76 300D, 350k miles?, SOLD in 1995
'75 240D, 300k miles, SOLD in 1991