W211 220cdi 06 facelift charging

SHAMGIT

Senior Member
Joined
Mar 2, 2015
Messages
151
Reaction score
22
Location
york
Your Mercedes
w211 2008 220cdi
Sons car on dash before startup it says its battery is showing 12.4.
When driving it stays just below that then after about 10 to 15 minuets it jumps straight up to 14v
Any ideas please .
thanks in antisipation.
 

mioba

Senior Member
Joined
Feb 19, 2006
Messages
7,898
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4,656
Location
Nottingham and Köln
Your Mercedes
W124/E200, W220/S320CDI, W205/C200, W251/R350CDI 4Matic
The sensor in the alternator or the alternator itself (worn bushes) to hazard a guess
 

onefortheroad

Senior Member
Joined
Dec 8, 2015
Messages
3,409
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Location
uk.
Your Mercedes
Me -2019 GLC 350 coupe AMG line. Mrs- ford kuga 65 plate awd powershift .
14v is normal. Not sure why there would be a delay. Possibly the regulator in the boot ?
 

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