New Batteries, but now no charging

[PhilL]

I have had a '54 E270 CDI for a couple of years and ever since I bought it I have occassionally had 'Battery Protection, Convenience functions temporarily disabled'. This could occur at any time, not often at startup but often in hot weather in traffic, but usually cleared after a few minutes.

I have been considering replacing the batteries even though the car starts fine and charging voltage about 14.4V.

Today I had a RED message 'Visit Workshop' with battery symbol, followed about 45 minutes later with another RED message 'Alternator/Battery, stop vehicle'.

Spoke to local Main dealer who quoted £164 for both main and auxilliary batteries, so collected and fitted easily.

Started car and still get RED messages!!! but now there is no charging voltage.

I plan to check connections to alternator/starter etc. but does anyone know if there is anything that may need resetting to allow the alternator to charge?

Any advice or experience gratefully received.

 

[BlackC55]

It could be a battery control unit fault or aan alternator issue.

A Star check is what is needed.

 

[jaymanek]

sounds like an alternator issue... luckily they arent that dear from aftermarket suppliers.

 

[Dieselman]

It might be as simple as the drive pulley not locking.

 

[Alps]

you can actually just replace the regulators on some w211 alternators, which is a cheaper option and can be done with it in situ.

 

[PhilL]

Thanks for the prompt replies.

Hindsight is a wonderful thing and I now think I should have checked the voltage when running after the 'Alternator/Battery - Stop Vehicle' message, and before replacing the batteries.

I have bought a replacement regulator as suggested by 'Alps'; £67 from local MB (luckily only 1.5 miles from home). I was pleased to see it incorporates new brushes, not a commonly used word nowadays, and gave me a degree of confidence that it might make a difference.

I now need to fit it. Which leads to the next question: On an E-Class, with the 2.7 diesel, is it possible to replace the regulator unit without removing the alternator?

Also; is it normal for the Parts Manager, and receptionist, at MB dealers to say "Good-by; see you again soon!!!! or is it just me?

As always, I look forward to your responses.

 

[ivandraganov]

Thanks for the prompt replies.

Hindsight is a wonderful thing and I now think I should have checked the voltage when running after the 'Alternator/Battery - Stop Vehicle' message, and before replacing the batteries.

I have bought a replacement regulator as suggested by 'Alps'; £67 from local MB (luckily only 1.5 miles from home). I was pleased to see it incorporates new brushes, not a commonly used word nowadays, and gave me a degree of confidence that it might make a difference.

I now need to fit it. Which leads to the next question: On an E-Class, with the 2.7 diesel, is it possible to replace the regulator unit without removing the alternator?

Also; is it normal for the Parts Manager, and receptionist, at MB dealers to say "Good-by; see you again soon!!!! or is it just me?

As always, I look forward to your responses.

Don't know for E class, but on the C class you have to be a magician to replace the regulator without removing the alternator

 

[BlackC55]

You will have to remove the alternator. Not tricky at all.

Before you spend any time on it. I would get it plugged in to a Star to check the BCM and to do a generator test.

It may save you ££