- Mercedes mild hybrid problems forum But, having turned the car off and on again, the problem disappeared. Where's the car now - at the dealer? Also, you say you called out the AA - is the car not covered by Mercedes Benz Mobilo roadside assistance? A second defect has been alleged relating to Mercedes-Benz vehicles with 48V/12V battery hybrid systems. A forum community dedicated to Mercedes Benz GLC owners and enthusiasts. I ordered the new c class plug in hybrid estate some 4 months ago and expected delivery next week. Rang MB and they tell me they don't give any warranty on PHEV or MHEV batteries after three years. 5L EQ engine. It's about crap batteries that are never charged to their rated 80 amp hours and will never hold any where near a full charge. It's not a mild hybrid, electrical, or software issue. My battery was at 20% of it's 80 ah rating after 40 mile drive home from purchase. The York dealer tells me there are problems with the battery for this model and says the car will probably not come until February now. I am looking at a 3 year old version which has just come to the end of it's MB warranty but have been reading horror stories of the 48 Volt Hybrid battery failures causing major problems. . I am looking at a 3 year old version which has just come to the end of it's MB warranty but have been reading horror stories of the 48 Volt Hybrid battery failures causing major problems. The defect causes vehicles to shutoff, overheat, go into limp home mode, or lose acceleration at highway speeds. Come join the discussion about performance, reviews, troubleshooting, maintenance, modifications, classifieds, and more! As above, most likely there's an issue with the mild hybrid battery on the 1. I ignored it, but did stop when various electrical things (like COMAND) started shutting down. A couple of months after taking delivery my car showed a red “12 volt battery not charging error” message. knzch walp ikwopl soqzkv wckol jkqk kwrzoqzqw ylshahx xsnae gizh