lower left, under the dash, feel for it, with your hand, as it is flush to the bottom of the dash, left and forward
The M111.974 engine fitted to the 2003 R170 Mercedes-Benz SLK230 uses the Eaton M45 Roots-type supercharger.
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Check the fuse, if power lock fuse is burnt, replace it.
The 2003 Mercedes-Benz S-Class has a V8 engine.
The 2003 Mercedes-Benz SL-Class has a V8 engine.
The 2003 Mercedes-Benz CL-Class has a V8 engine.
The 2003 Mercedes-Benz G-Class has 24 valves.
The 2003 Mercedes-Benz S-Class has 24 valves.
The 2003 Mercedes-Benz E-Class has 18 valves.
The 2003 Mercedes-Benz M-Class has a V6 engine.
The 2003 Mercedes-Benz C-Class has 16 valves.
The 2003 Mercedes-Benz SLK-Class has 16 valves.