SL55/63/65/R230 AMG: SL55 won't start after driving it hard
Thread Starter
Member
Joined: Feb 2010
Posts: 160
Likes: 0
From: San Juan, Puerto Rico
2004 SL55 AMG
SL55 won't start after driving it hard
whenever i do some hard highway driving and turn the car off, if i try to turn it on again, it acts as if there's not enough juice in the battery. it will jump start though. also it starts fine on its' own after about a 40 minute "cool down". during my drive this a.m. the temp gauge read normal and the intake temp was between 125*F-145*F depending on how hard i was pushing.
dealer checked but said he couldn't find anything wrong. I've already replaced both batteries.
i'm stumped
and going nuts 
any ideas peeps?
dealer checked but said he couldn't find anything wrong. I've already replaced both batteries.
i'm stumped
and going nuts any ideas peeps?
Super Member
Joined: Apr 2009
Posts: 870
Likes: 1
Pinto
possible your intake temp too high.. open or short circuit at times..
possible your coolant pump or you supercharger pump is not cooling the system down enough.. already check cooling system? any leaks any air?
if your coolant temp reach high out of limit range your computer won't let you start the car until it cool down..
do you have any code store? check it even though your engine light is not on.. it could have temporary code..because only hard code will set the light on right away..
viet amg 408
possible your coolant pump or you supercharger pump is not cooling the system down enough.. already check cooling system? any leaks any air?
if your coolant temp reach high out of limit range your computer won't let you start the car until it cool down..
do you have any code store? check it even though your engine light is not on.. it could have temporary code..because only hard code will set the light on right away..
viet amg 408
Thread Starter
Member
Joined: Feb 2010
Posts: 160
Likes: 0
From: San Juan, Puerto Rico
2004 SL55 AMG
possible your intake temp too high.. open or short circuit at times..
possible your coolant pump or you supercharger pump is not cooling the system down enough.. already check cooling system? any leaks any air?
if your coolant temp reach high out of limit range your computer won't let you start the car until it cool down..
do you have any code store? check it even though your engine light is not on.. it could have temporary code..because only hard code will set the light on right away..
viet amg 408
possible your coolant pump or you supercharger pump is not cooling the system down enough.. already check cooling system? any leaks any air?
if your coolant temp reach high out of limit range your computer won't let you start the car until it cool down..
do you have any code store? check it even though your engine light is not on.. it could have temporary code..because only hard code will set the light on right away..
viet amg 408
what's the acceptable intake temp range?
didn't think it was a bad pump as i didn't lose any power and got no other warnings. could be though
don't think it's the computer b/c it tries to start but act like it doesn't have the juice. then, hook up jumper cables and she fires right up.
not sure about the codes. have to check
Last edited by sbenus; Sep 19, 2010 at 06:42 PM.
Super Member
Joined: Apr 2009
Posts: 870
Likes: 1
Pinto
no leaks.
what's the acceptable intake temp range?
didn't think it was a bad pump as i didn't lose any power and got no other warnings. could be though
don't think it's the computer b/c it tries to start but act like it doesn't have the juice. then, hook up jumper cables and she fires right up.
not sure about the codes. have to check
what's the acceptable intake temp range?
didn't think it was a bad pump as i didn't lose any power and got no other warnings. could be though
don't think it's the computer b/c it tries to start but act like it doesn't have the juice. then, hook up jumper cables and she fires right up.
not sure about the codes. have to check
lol you just answered your own question..
how about check your charging system...? battery replaced twice.. ummmm
Thread Starter
Member
Joined: Feb 2010
Posts: 160
Likes: 0
From: San Juan, Puerto Rico
2004 SL55 AMG
Trending Topics
Super Member
Joined: Apr 2009
Posts: 870
Likes: 1
Pinto
some of the info you say could be wrong and w/o looking at the car its hard to come to any conclusion...
NikleinR6 say replacing parts w/o confirm its bad..might as well throw money away..lol
instead going to dealer find any other independent benz shop have them diagnose it see if they can find anything...
goodluck
NikleinR6 say replacing parts w/o confirm its bad..might as well throw money away..lol
instead going to dealer find any other independent benz shop have them diagnose it see if they can find anything...
goodluck
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Senior Member
Joined: Oct 2009
Posts: 321
Likes: 63
From: Miami, Fl
08 ML350, 2011 E550 Cab
some of the info you say could be wrong and w/o looking at the car its hard to come to any conclusion...
NikleinR6 say replacing parts w/o confirm its bad..might as well throw money away..lol
instead going to dealer find any other independent benz shop have them diagnose it see if they can find anything...
goodluck
NikleinR6 say replacing parts w/o confirm its bad..might as well throw money away..lol
instead going to dealer find any other independent benz shop have them diagnose it see if they can find anything...
goodluck
Viet> show a little respect for us knowledgeable DIYers Please....
Thread Starter
Member
Joined: Feb 2010
Posts: 160
Likes: 0
From: San Juan, Puerto Rico
2004 SL55 AMG
Super Member
Joined: Apr 2009
Posts: 870
Likes: 1
Pinto
Hold on a min.... I never said to start replacing parts without confirming they are bad...In his 1st post, he said he had both batteries replaced... I had these same problems and I replaced my starter battery and all is well now... If I were the OP I would go back to the dealer, independent mech, or even Advanced auto and have them check the starter battery.. if it is faulty, you battery is warranted for 24 months...
Viet> show a little respect for us knowledgeable DIYers Please....
Viet> show a little respect for us knowledgeable DIYers Please....
sorry shame on me
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,703
Likes: 5
From: Arizona
SL55AMG, Ferrari 348, Ferrari Testarossa, Ferrari F40, Ferrari Mondial t, Ducati 916, Indycar
This sounds like a 'hot start' issue that I have had with my Ferrari's, and the fix was adding a relay in the system between the battery and the starter. BAP imported parts has a 'hot start' fix kit.
Member
Joined: Dec 2008
Posts: 244
Likes: 1
From: Louisiana
2005 SL500
Along the lines of what Dino said, I would wonder if your battery or starter motor suffers from a heat-soak issue. Batteries (and usually high-amp motors) suffer badly when heated up too much. Have you tried to touch your battery after driving hard? It should not be far too painful to touch. Or at least check the voltage coming from it when it is hot. Efficiency degrades as the battery heats up -- I suffered a similar problem on an old Crown Vic I had back in the day. Didn't clear up till I bought a new battery. The old battery was only a year old, but it was gone.
-ROOK
-ROOK
Senior Member
Joined: Oct 2009
Posts: 321
Likes: 63
From: Miami, Fl
08 ML350, 2011 E550 Cab
A good concept to remember... Cold weakens a battery, heat reveals their true condition...
BTW. Haven't had a single problem since replacing my starter battery. Cranks right up every time
BTW. Haven't had a single problem since replacing my starter battery. Cranks right up every time
Thread Starter
Member
Joined: Feb 2010
Posts: 160
Likes: 0
From: San Juan, Puerto Rico
2004 SL55 AMG
problem fixed...hopefully
well we replaced both batteries today for OEM ones and then cleared the bunch of error codes that had accumulated due to low voltage.
btw, yes, this was at my garage. the MB tech is a new buddy of mine
will do a proper shakedown tomorrow
btw, yes, this was at my garage. the MB tech is a new buddy of mine
will do a proper shakedown tomorrow
Last edited by sbenus; Oct 16, 2010 at 04:59 PM.
