Date registered: Sep 2006
Vehicle: 2004 CLK 240 Coupe
Location: Norfolk. UK
Mentioned: 8 Post(s)
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Quoted: 284 Post(s)
The WIS does not advise where to put axle stands (it is the M-B workshop document after all, where lifts are available)
However, it does advise where to lift from. Your W203 has the same chassis as my W209 CLK, so I am familiar with this image below.
If you remove the plastic covers under your car, you will see the 'block' at the centre of the front cross transverse of the front axle. I would use a block of wood to protect the surface while jacking.
At the rear, MB suggest raising the bottom of the diff. box. Again, I would protect the surface with a block of wood.
The axle stands can then fit under the axles - not the steering gear, of course.