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Leisure battery not charging when plugged in

vikpyr

New Member
Hello Everyone.
I've started experiencing an issue with my 2017 MP. Leisure battery charges fine when driving, but when it's plugged into the mains it shows 'charging' on the MP control hub but the battery runs flat within 1.5-2 days when running fridge etc. 230V socket inside does work.
Has anyone experienced this problem?
P.S. I checked all fuses in the passenger footwell, under seats and under the fridge - all seem fine!
 
Last edited:

Epigram

Active Member
Hello Everyone.
I've started experiencing an issue with my 2017 MP. Leisure battery charges fine when driving, but when it's plugged into the mains it shows 'charging' on the MP control hub but the battery runs flat within 1.5-2 days when running fridge etc. 230V socket inside does work.
Has anyone experienced this problem?
P.S. I checked all fuses in the passenger footwell, under seats and under the fridge - all seem fine!
If the mains socket does not work when connected to the mains check that the ELCB button has not been pushed in by accident. Fridge should run for at least 3 days on setting 3. Possibly the a leisue battery on the way out.
 

enano

New Member
Hello Everyone.
I've started experiencing an issue with my 2017 MP. Leisure battery charges fine when driving, but when it's plugged into the mains it shows 'charging' on the MP control hub but the battery runs flat within 1.5-2 days when running fridge etc. 230V socket inside does work.
Has anyone experienced this problem?
P.S. I checked all fuses in the passenger footwell, under seats and under the fridge - all seem fine!
Do you mean the internal battery discharges while being connected to 230V?
That should not happen. I would start checking the fuses under the fridge, which you already did. Next check output voltage at the AC battery charger under the fridge, loose cables next to it, rusty battery connectors...
 

WILLH

Active Member
My leisure battery is starting to show the same symptoms(mine is a 2017 as well).The most likely cause is that the leisure battery is on its way out.
 

herbert

New Member
Hello, Everyone. Not sure if this will help mine MP 2019

I have had the battery changed 3 times under warranty the first 2 defects were low voltage as seen on the controller screen and the battery would not charge. The 3rd one was this week and the systems were --
1 The controller screen was blank as if it was switched off.

2...The lights within the kitchen/bed area would not come on although the reading lights for the driver and passenger did work.

3 The mercedes garage said they have replaced the engine battery but not the leisure battery.

4 I have not had a problem starting the MP even after 2 days parked this week so can not understand why this should cure the problem.
Everything now works, control panel lights up and the status of the leisure battery can be seen in the controller.
Can anyone answer the following for me?

1. Where is the leisure located, under the passenger or drivers seat?
2. Is the amp/hour rating the same for both batteries?
3. Has the engine battery any effect on the controller?
 
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