C300 hybrid problems
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Joined: May 2017
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C300 hybrid
C300 hybrid problems
I've had my C300 hybrid for 18 months. for the first 6 months it seemed to function as expected. The diesel turned off whenever coasting or stopped. My consumption was typically 6.8l/100km. Then it changed and the diesel stopped turning off as often. The consumption increased to 8.0l/100km. I took it to MB Service and they said they couldn't find anything wrong but did update the software. It was back to normal for 6 months, but now it has reverted to almost continually having the diesel engine on. Even when stopped at lights etc.
I've seen a few posts about this from last year but no real answers or solutions. Does anyone else still have this problem?
I've seen a few posts about this from last year but no real answers or solutions. Does anyone else still have this problem?
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Joined: Mar 2017
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From: Milton Keynes
C300h Bluetec
I had that problem a few weeks ago, the dealer said it was a telematics update and mine was fine. I am sceptical on that though.
It has been mentioned on other forums that it may be related to the Secondary battery.
Hoping that mine does not return after 6 months
It has been mentioned on other forums that it may be related to the Secondary battery.
Hoping that mine does not return after 6 months
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C300 hybrid
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Joined: Jun 2016
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From: Melbourne, VIC, Australia
X253 GLC 43 (AU), X294 EQE 500 SUV (MY)
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Joined: Nov 2016
Posts: 268
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2017 Mercedes-Benz C300, 2017 Mercedes-Benz GLC300
WOW! That is just waaay too much for a diesel. 8.0l/100km is what I get with my C300 gasoline (2.0L engine) and mine is not a hybrid.
I've never believed in hybrids and this is a good example why. There's just too many extra parts meaning too many things that can go wrong and too little gas saved that may not (and will probably not) compensate the repair costs, time wasted and eventually the bitter taste in your mouth.
I've never believed in hybrids and this is a good example why. There's just too many extra parts meaning too many things that can go wrong and too little gas saved that may not (and will probably not) compensate the repair costs, time wasted and eventually the bitter taste in your mouth.
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C300 hybrid
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C63s
Originally Posted by blizzard12
WOW! That is just waaay too much for a diesel. 8.0l/100km is what I get with my C300 gasoline (2.0L engine) and mine is not a hybrid.
I've never believed in hybrids and this is a good example why. There's just too many extra parts meaning too many things that can go wrong and too little gas saved that may not (and will probably not) compensate the repair costs, time wasted and eventually the bitter taste in your mouth.
I've never believed in hybrids and this is a good example why. There's just too many extra parts meaning too many things that can go wrong and too little gas saved that may not (and will probably not) compensate the repair costs, time wasted and eventually the bitter taste in your mouth.
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Senior Member
Joined: Jan 2016
Posts: 276
Likes: 21
C350e
WOW! That is just waaay too much for a diesel. 8.0l/100km is what I get with my C300 gasoline (2.0L engine) and mine is not a hybrid.
I've never believed in hybrids and this is a good example why. There's just too many extra parts meaning too many things that can go wrong and too little gas saved that may not (and will probably not) compensate the repair costs, time wasted and eventually the bitter taste in your mouth.
I've never believed in hybrids and this is a good example why. There's just too many extra parts meaning too many things that can go wrong and too little gas saved that may not (and will probably not) compensate the repair costs, time wasted and eventually the bitter taste in your mouth.
I am driving a C350e for 20 months now and never had an issue.
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Joined: Sep 2015
Posts: 56
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From: Antrim, Northern Ireland
C300 diesel hybrid
I've experienced this problem but it's intermittent; it's also been discussed in another thread on this forum, search for hybrid and you should find it.
The problem is not with the hybrid battery but with the normal low voltage battery. When you are driving in hybrid mode it's the low voltage battery that is powering all the accessories...power steering, fans, etc and since the engine is not running it's just drawing down on the battery and not being charged until the engine kicks in again. So the hybrid car puts a lot more stress and charge cycling on the low voltage battery than the equivalent diesel. At some point the car senses the voltage is low and will not allow the car the switch to hybrid mode. Some batteries have been replaced under warranty. If you have a good battery conditioner or charger like a CTEK, try leaving it on charge overnight and see if that makes any difference. I intend to have it addressed at the next service.
The problem is not with the hybrid battery but with the normal low voltage battery. When you are driving in hybrid mode it's the low voltage battery that is powering all the accessories...power steering, fans, etc and since the engine is not running it's just drawing down on the battery and not being charged until the engine kicks in again. So the hybrid car puts a lot more stress and charge cycling on the low voltage battery than the equivalent diesel. At some point the car senses the voltage is low and will not allow the car the switch to hybrid mode. Some batteries have been replaced under warranty. If you have a good battery conditioner or charger like a CTEK, try leaving it on charge overnight and see if that makes any difference. I intend to have it addressed at the next service.
