CL500 vs CL55 AMG part differences
 

Hi, I'm looking at two 2002-2003 CL cars with relatively low mileages (under 70000 miles) and I'm trying to make a good assessment between the two.

One is a 2003 CL55 AMG and the other is a 2002 CL500. For 16-17 year old cars like those, there's surely going to be some maintenance to be taken into account.

What I would like to ask is what would be the major differences in repairability between the two. I know the CL55 AMG has the supercharger assembly and slightly different brakes (and maybe valves), but I'm wondering if there are any parts that are significantly harder to get/more expensive than the CL500 (besides the ones mentioned before).

I tried to find any sources that list the main engine differences between the two, but I couldn't find anything useful. Is there somebody that could please help me in this regard?