Can I jump start a CL600 V12?

[Swotty]

Hi everyone,

2003 CL600 TT

Car won't start after standing for 2 days. Had to open boot with key and noticed the door/boot close system seemed to be cycling - ticking noise from left hand side of boot.

First thing is to try and start the car ..... I have heavy cables ..... but I have a nagging thought that I have read that these cars must not be jump started. Can anyone confirm, please?

Many thanks,

Stuart

 

[markjay]

Can I jump start a CL600 V12?​

Yes, with a push.



Sorry couldn't resist... .... I'll get my

 

[markjay]

On a serious note.... it's best to jump start from an external battery that is not fitted in another vehicle.

Alternatively, some members on here suggested that switching on the high beam on the 'donor' car for a few minutes before connecting the leads will prevent the risk of a spike.

 

[W1ghty]

Your in car manual will explain how to do it if you have to . Can you remove the battery and charge it instead ?

 

[Atavus]

I’d jump start it.

 

[bob6600]

I have a jump pack and would happily use it on this car

 

[geoffus]

Use a donor car or jump pack, dont worry about "spikes", they live with the fairies and unicorns.

 

[clk320x]

why would it be an issue if done correctly?

 

[Swotty]

Thanks everyone ..... I thought I'd read somewhere (in the handbook?) that a jump start might be too much for the complex electronics. I have a jump starter and CTEK chargers/conditioners, but a donor vehicle jump start is quicker ... as long as nothing gets fried.

Sorting the battery drain .... hoping it's just the boot locking ... it started to be reluctant to open on the key fob a couple of months ago, the door release having packed up 2 years ago.

Thanks again,

Stuart

 

[geoffus]

Let us know how you get on.

 

[carat 3.6]

Turn the headlights on before you connect your jump starter/ other car, voltage spikes are very real and can kill an ECU easily. Once connected you can turn them off again.

 

[geoffus]

Turn the headlights on before you connect your jump starter/ other car, voltage spikes are very real and can kill an ECU easily. Once connected you can turn them off again.

Please explain how a spike occurs.

 

[markjay]

Please explain how a spike occurs.

How To Jump a Car With a Battery Pack

Dead battery? No problem! Here's how to jump a car with a battery pack in a few simple steps and get back on the road in no time.

www.familyhandyman.com

That's the theory, anyway - never experienced it myself.

 

[Swotty]

Turn the headlights on before you connect your jump starter/ other car, voltage spikes are very real and can kill an ECU easily. Once connected you can turn them off again.

Thanks - headlights on the donor car, as MJ has suggested?

 

[geoffus]

How To Jump a Car With a Battery Pack

Dead battery? No problem! Here's how to jump a car with a battery pack in a few simple steps and get back on the road in no time.

www.familyhandyman.com

That's the theory, anyway - never experienced it myself.

That's gobbledegook i'm afraid, the alternator will not over voltage, it has a voltage regulator built in.
The battery voltage is the same whether a donor car battery or jumper pack.
The car battery will soak up any such spikes, your very sophisticated ECU will also have a level of protection from such an event.

 

[Swotty]

Thanks again - I've put the jump charger on charge, but it's only a 33ah 800 amp so I reckon between 200 and 250 cca ... way too low to start the big lump.

I'll put a CTEK on it first thing and see how that's doing tomorrow evening and then try the jump charger. Failing that, I'll borrow the jump charger from the classic car garage in town - it's a powerful unit.

Just a tad nervous about jump starting it from the Corvette and frying something. Good job it's at home and not elsewhere.

 

[carat 3.6]

Thanks - headlights on the donor car, as MJ has suggested?

Switch on the lights on the car you want to start before you connect anything, that way when you make the connection any power surge is absorbed by the current draw of the bulbs.

That's the theory anyway, and has always worked for me.

I also never jump one car from another, I only use a slave battery or jump pack.

 

[markjay]

That's gobbledegook i'm afraid, the alternator will not over voltage, it has a voltage regulator built in.
The battery voltage is the same whether a donor car battery or jumper pack.
The car battery will soak up any such spikes, your very sophisticated ECU will also have a level of protection from such an event.

No idea - as I pointed out, I never experienced any issues myself, though in recent years I started using a jump starter pack rather than car-to-car, just in case.

 

[geoffus]

Thanks again - I've put the jump charger on charge, but it's only a 33ah 800 amp so I reckon between 200 and 250 cca ... way too low to start the big lump.

I'll put a CTEK on it first thing and see how that's doing tomorrow evening and then try the jump charger. Failing that, I'll borrow the jump charger from the classic car garage in town - it's a powerful unit.

Just a tad nervous about jump starting it from the Corvette and frying something. Good job it's at home and not elsewhere.

I hate the term “frying” it’s a term to describe all manner of burnt and and melted Circuit boards engulfed in smoke, simply untrue.

 

[Swotty]

I hate the term “frying” it’s a term to describe all manner of burnt and and melted Circuit boards engulfed in smoke, simply untrue.

Sorry - just expressing my worst fears and, as a Yorkshireman, wondering how much it's going to cost me!