Well your 124 24V vs a W202 C36 is a big difference. The C36 is a different chassis, it's smaller in the boot and rear seat, more fetures, newer design, more power. I have heard whispers that the C36 has a piston or camshaft weakness, you'll have to talk to some owners to get more info.
If you want to move to a W202 then a C43 would be a better option as the 113 engine is very reliable and doesn't experience oil leaks like a 104 engine. I guess it depends on your budget.
I worked on a really nice silver C43 wagon last week.........take the badges off, take the chrome exhuast tips off and throw some hubcaps on it and you'd have yourself a real sleeper!
