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My 2015 C300 recently hit 60,000 miles!
Interior build quality has been pretty good. No new rattles, no chipping on plastics. 2 weird gremlins have appeared.
1) iPhone USB will randomly disconnect and won't reconnect unless headunit is completely reset by holding eject. Doesn't happen enough to worry about it.
2) Driver's door handle will respond to Keyless-GO lock maybe 1:3 times. Unlock works no problem. Dealer ran codes on module, found nothing. Performed software update and new key battery. Issue still there, but again, not a huge deal.
Almost two weeks ago, I noticed a pretty big puddle of oil on my garage floor and towed it, had it dropped off at the dealer.
Dealer found two oil leaks. One from the oil cooler, oil leaking from vacuum pump to head seal and a second leak from camshaft plug from rear of head. Both taken care of covered by my extended warranty at least!
Part of me thinks that these are coming from when I had the wrist pin repair done about a year ago, but who knows.
Your USB issue "could" be "worn USB" port causing intermittent connection - (1) spray the port with MAF cleaner in case it's just dirt/wear (2) if the port has been :"racked" inside you could price out replacement from what I recall it's not-so-bad it replaces that "USB board" with both fresh sockets
You can try this - before you get out to your MB delete the MB profile from your phone, then reboot the phone (full power off wait a sec then power back on) - in your MB delete your existing Phone profile from the head unit, then reboot the head unit - ( full power off then wait a sec and power back on) - then do fresh phone setup.
If profiles on both sides are deleted - and both sides rebooted - then fresh setup - this "might" solve the issue caused by that major iOS update.
My 2015 C300 turned 60,000 miles about three weeks ago. Have owned the car since 14,800 miles. No issues. So far the MB casino is winning on my extended warranty bet.
03-18-2020, 06:40 PM
