W210 e320 transmission

[Mbw2101]

Hi there I have a w210 e320 when I switched my headlight on the transmission goes in to limp mode and as soon as I switch the lights of it is fine has anyone heard of this before

 

[alabbasi]

when you get around to scanning it, you'll likely find low voltage codes all over the place. I expect that your battery is on the way and the electronics in your gearbox don't like it when there's an extra load from the headlights.

 

[Mbw2101]

Thanks for getting back to me I look in to that when I get chance

 

[alexanderfoti]

If not that, check the ground strap(s) has not corroded off and fallen away from the engine/chassis somwhere.

 

[DSM10000]

Or it may be the Alternator.

Any garage should be able to check this and the battery.

 

[Mbw2101]

Thanks for reply
Think I have found the issue led side lights bulb put standard one in and seems OK I did check alternator and battery
Alternator was 14.6 battery was 14.1 when started don't no if that means any thing

 

[Smiley]

Your alternator and battery are in good shape with those readings - in fact 14.1v for the battery sounds high. Was that measured across the battery before starting the engine?

 

[amazighman]

Measure the battery with engine off , how old is the battery?

 

[Mbw2101]

It is a Cople year old car starts straight away and tried switching everything on and seams fine until I switch lights on

 

[Mbw2101]

Your alternator and battery are in good shape with those readings - in fact 14.1v for the battery sounds high. Was that measured across the battery before starting the engine?

That was when started