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hello to all, I recently purchased a 230E 1989/1990 with 69000 miles and in excellent condition. Car runs very well but I am getting exhaust smell in cabin whilst in traffic or stopped. could this be the PCV valve? is this car fitted with one? Idle is a little erratic too, should I be looking at the Idle control valve? Let me know your thoughts please,
Regards
Michael
 

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'95 E300 DIESEL, '91 600SEL, '92 600SEL
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Yes, all modern engines have a crank vent system including the W124.

However, I'd look at the exhaust manifold and exhaust system for any signs of leakage before thinking PCV.
 
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