No, none of the w203s sold in the US had SLS. It was an option outside the US.

Keep in mind that the front suspension and brakes on the 4matics is completely different from RWDs and vastly more expensive to repair and maintain because there are no aftermarket options. For example Sachs, Bilstein, KYB and many others offer front struts for the RWD W203. Only the dealer offer 4matic front struts. Same goes for control arms, steering components, brakes etc.
C240 (m112) and later C280 (m272) were also available with 4matic. C240 4matic wagon is diesel slow and V8 thirsty.

As previously mentioned, get an m112 powered w203 (c240 or c320) or or w210 (e320) or w211. The m112 is the closest thing MB ever built to a bulletproof gasoline engines. Theres no VVT, simple port injection, double row timing chain, compact SOHC heads, no plastic components etc. The m272 that followed it was a big step up in complexity and power at the expense of reliability. And then there's the whole balance shaft thing.

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CENSORED due to not family friendly words