Hey all,
I'm in the market for a used 560 engine to install in my W107, and I've got some questions:

First and foremost, how does one distinguish a low-output 560 from a hi-output 560? Dropped by my friendly MB Tech today, and according to the Bosch directory, the 300bhp engine is RB # MB1128, whereas the 238bhp engines are either RB # MB1130 or 1172. The 1128 was made ONLY between 10/85 to 08/87. All the aforementioned engines are M117.968's... I checked out an engine he happened to have lying around, and I couldn't find any evidence of this RB code nonsense... Now my question is, how can I best distinguish a 240bhp engine from a 300bhp engine? Are there any external clues to guide me? Secondly, what exactly is the difference between the two? I'd really appreciate your help on this.

P.S. I am located in Lebanon, where the majority of used cars and parts come from Germany and Switzerland...

Anyone?

__________________
"There are a number of mechanical devices which increase sexual arousal, particularly in women.
Chief among these is the Mercedes-Benz 450SL convertible." --P.J. O'Rourke

I never heard of 300 hp 560's.

__________________
Steve
1985 Mercedes 500SL Euro (Gray market)
1995 BMW 520i Euro (Gray market)
1992 BMW 525it Wagon
1994 Honda Del Sol Si

You learn something new everyday... But rest assured, they DO exist!

I should have added that I am aware of the existence of ECE, KAT, and RUF variants, its just that I haven't been able to locate anything of the sort on the block itself... Remember, I don't have access to complete cars and thus cannot check any plaques which may be on the car itself... Maybe the exhaust manifold might provide some clues?

__________________
"There are a number of mechanical devices which increase sexual arousal, particularly in women.
Chief among these is the Mercedes-Benz 450SL convertible." --P.J. O'Rourke

The 300hp versions were the gray market cars, right?

They were probably offered in any color in Lebanon. Grey included.

I can't think of any way to tell from the motor but it seems the upgrade code was 822. It should be possible to get the chasis number that the questioned engine was in and from the data card decide whether it came with that option code.

It also could be presumed from the cams numbers installed. The cam number is punched into the back end of the cam. The right cam could be 117 051 17 01 or a replacement changed to 117 051 25 01. So the numbers one would see on the end would be 17 or 25 for the right and 16 or 24 for the left.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician