Intermittent pulling sensation when using cruise control?




2013 ML350 Bluetec. 340 000km. Every 5-10 minutes or so, while I'm using the cruise control, I'll get a random pulling sensation as if I'm pulling a trailer. The car will slow down by 2-3 km/h and then resume back to the cruise control speed. It's a really weird sensation. I have seen it happen while not using the cruise control, but it doesn't happen as frequently. About once or twice a month, my cruise control will go inoperative when I activate it (worst on very cold days). Turning off the car and opening the door will make it functional again.
Is it possible it's a wheel bearing with the integrated magnetic strip going out making the ABS sensors go nuts for a split second? My rear right bearing does make some noise on very cold days (under -20C ) and I plan on changing it soon.
No check engine lights and I plugged in my Autel scanner and no faults are being shown. Has anyone delt with this problem before?
Thanks for the help.
Last edited by Potrice; Mar 6, 2025 at 09:19 AM.
2013 ML350 Bluetec. 340 000km. Every 5-10 minutes or so, while I'm using the cruise control, I'll get a random pulling sensation as if I'm pulling a trailer. The car will slow down by 2-3 km/h and then resume back to the cruise control speed. It's a really weird sensation. I have seen it happen while not using the cruise control, but it doesn't happen as frequently. About once or twice a month, my cruise control will go inoperative when I activate it (worst on very cold days). Turning off the car and opening the door will make it functional again.
Is it possible it's a wheel bearing with the integrated magnetic strip going out making the ABS sensors go nuts for a split second? My rear right bearing does make some noise on very cold days (under -20C ) and I plan on changing it soon.
No check engine lights and I plugged in my Autel scanner and no faults are being shown. Has anyone delt with this problem before?
Thanks for the help.








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