Skip the auto shop - Our mechanics make house calls

Q: Car won't start, battery drain - 1979 Mercedes-Benz 450SL

asked by on

If my car sits for more than one hour, I have to get it jump-started as it wouldn't start up. I figured that the battery is getting drained so I need to check the voltage regulator, but I just can't find it. Is it possible that it's in the alternator?

A: Hello. The Chilton manual will be able to g...

Hello. The Chilton manual will be able to give you accurate information as to the location of the voltage regulator. This manual can tell you whether your voltage regulator is an internal or external part. It is not recommended that this repair job be completed on your own. Have a certified technician, like one from YourMechanic, pinpoint the cause of the starting issue and address this problem correctly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: My car is difficult to accelerate after running for sometime

I believe there is a fuel filter on your vehicle as well. Was that changed too? A new fuel pump cannot perform with a clogged or partially clogged fuel filter. For issues like this, a technician will be able to...

Q: Possible electrical issue - 2008 Dodge Avenger

Hello, thanks for writing in. A battery at 45% power is a bad battery. If it takes a charge and then is back to "45%" within hours, the battery is not holding a charge correctly. There is possibly a parasitic...

Q: Pcm ecu car won't start

Assuming the ECM is still working enough to report problems, getting any problem codes out of the system with a code reader is your best clue at this point - whether the Check Engine Light is illuminated or not. If...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...