My '95 S320 won't shift into 5th gear on Hgwy.
It sometimes does after stopping at a toll and taking off again.
What could be the cause and how can I troubleshoot?
Thanks,
Sab.

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regards,
Sab.
'07 ML320 CDI (398 ft lbs / 1400 RPM)
'02CL 500
'91 928 GT Supercharged