I have a 91 300CE, and my speedometer goes up to 260kmh...It's an M104 engine...I totally agree about that sportline package, mine is very smooth and stable up to the fastest speeds I'll ever drive...I've had her up over 120mph, but it scared the s#*t out of me...ha

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1991 300CE Sportline
1983 300SD TurboDiesel (Gone but not forgotten)