SL55/63/65/R230 AMG: New SL55 owner with some problems/questions
I've bought an SL55 2003 couple of days ago. Tested and checked it for 3 days and it was running perfectly until recently;
1) Today it was hot here (45 C degree), after driving/idling for a while, started to smell gas inside the car and the trunk ...
2) check coolant level and washer level popped up, however, temp was normal (in middle between 80 and 100) but the temp icon in cluster flashed red sometimes then back to white. Once Reached home, ive let the car idle but temp did not rise. After car cooled down checked the coolant it was full, but the washer was not, topped it and both messages did not show up again till now ?!
3) Car drops from front right over night but once it turned on it levels itself, is that front right hydrualic valve ?
4) There is heat in the centre consel after driving for a while, you can feel your legs are warmer ? (Both sides driver/passenger)
Sorry for the long post. Hope you guys help me to figure these things out.
Thanks.
Last edited by mAMG; Jul 16, 2016 at 02:56 PM.
I've bought an SL55 2003 couple of days ago. Tested and checked it for 3 days and it was running perfectly until recently;
1) Today it was hot here (45 C degree), after driving/idling for a while, started to smell gas inside the car and the trunk ... Check your fuel connections to the tank - evap systems as well. A bad hose?
2) check coolant level and washer level popped up, however, temp was normal (in middle between 80 and 100) but the temp icon in cluster flashed red sometimes then back to white. Once Reached home, ive let the car idle but temp did not rise. After car cooled down checked the coolant it was full, but the washer was not, topped it and both messages did not show up again till now ?! Check the coolant/washer sensors and their connections, flush the coolant if needed?
3) Car drops from front right over night but once it turned on it levels itself, is that front right hydrualic valve ? Have the hydraulic fluid checked first - it maybe way old and your hydraulic system will suffer badly when the system is not maintained. Bad strut?
4) There is heat in the centre consel after driving for a while, you can feel your legs are warmer ? (Both sides driver/passenger). Sounds like the transmission is heating up. Is the trans cooler hooked up? Does the trans fluid need to be replaced?
5) owner told me the engine was changed cause old one was damaged. Mostly the guy he bought it from modded it. Current engine is stock (No cp/sc), i want to know if it is running on stock tune or not, otherwise im afraid this engine gets damaged too if ECU is tuned. How is the engine running? Did the new engine come from the same year model? There are lots of sensors that matter when an engine R&R is done - Do you have the original ECU in the car now? The ECU is important and controls lots of parameters. You need to make sure that the ECU is appropriate for your car and your engine. There could be some issues and revisions to the different systems depending on model year of the original and the new. You are going to need help from a diagnostic system to see if the ECU has a tune or not.
Sorry for the long post. Hope you guys help me to figure these things out.
Thanks.



the cheapest place i've found for oem parts is mbdirectparts.com (that is where I would suggest getting the accumulators from)
the cheapest place i've found for oem parts is mbdirectparts.com (that is where I would suggest getting the accumulators from)
I've bought an SL55 2003 couple of days ago. Tested and checked it for 3 days and it was running perfectly until recently;
1) Today it was hot here (45 C degree), after driving/idling for a while, started to smell gas inside the car and the trunk ...
2) check coolant level and washer level popped up, however, temp was normal (in middle between 80 and 100) but the temp icon in cluster flashed red sometimes then back to white. Once Reached home, ive let the car idle but temp did not rise. After car cooled down checked the coolant it was full, but the washer was not, topped it and both messages did not show up again till now ?!
3) Car drops from front right over night but once it turned on it levels itself, is that front right hydrualic valve ?
4) There is heat in the centre consel after driving for a while, you can feel your legs are warmer ? (Both sides driver/passenger)
5) owner told me the engine was changed cause old one was damaged. Mostly the guy he bought it from modded it. Current engine is stock (No cp/sc), i want to know if it is running on stock tune or not, otherwise im afraid this engine gets damaged too if ECU is tuned.
Sorry for the long post. Hope you guys help me to figure these things out.
Thanks.



BTW: the service life on those accumulators are about 10 years/ 100k.
On an 03 SL you likely are going to have a gas tank baffle that the weld breaks on and when the tank is low and you come to a sudden stop you'll hear it flopping around in there. some 03s also had a different rear differential that uses bolt on axles which are different as well as a smaller ring gear that requires a specific limited slip (you can't use a limited slip designed for an 04+)
Eventually the two black plastic pieces on the exterior on either side of the rear window will start to discolor. On an 03 the plates they attach to as well as the plastic pieces will BOTH have to be replaced to the 04+ version as the 03 plastic plates are no longer made.
These are the main quirks I've found out thus far on my 03 SL55
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BTW: the service life on those accumulators are about 10 years/ 100k.
On an 03 SL you likely are going to have a gas tank baffle that the weld breaks on and when the tank is low and you come to a sudden stop you'll hear it flopping around in there. some 03s also had a different rear differential that uses bolt on axles which are different as well as a smaller ring gear that requires a specific limited slip (you can't use a limited slip designed for an 04+)
Eventually the two black plastic pieces on the exterior on either side of the rear window will start to discolor. On an 03 the plates they attach to as well as the plastic pieces will BOTH have to be replaced to the 04+ version as the 03 plastic plates are no longer made.
These are the main quirks I've found out thus far on my 03 SL55
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This problem kept following me from W211 E55 to this SL. I dont really know what should be done since there is not much topics about fuel smells in R230 forum.
The car consumes fuel wayy too much than the E55, im sure there is a leak somewhere. Also, everytime I open the gas cap, there is excessive pressure. Moreover, the car struggles to start EVERYTIME it is warm and has been off for 2 hours.
I'm sure the excessive pressure, excessive fuel consumption and warm starts struggle are all related and causing the smell of fuel in the cabin.
Any one has an idea where to start with fuel problems on R230 platform?
Thanks.
in front of the wheel . remove the plastic cover and check if the evap hose is in place . that was my problem . reconnected and all smell gone . it was loose ...hope it helps..
Any idea when to change the fuel pump ? Or how to know it needs to be changed ?




I've changed the canister filter, and fuel filter but problem still exists.
- Fuel smell exists when at half of the tank. It 100% exists everytime when half of the tank is empty (2 Quarters left) and car is warm. I even tried to fill the tank and after that the smell decreased noticeably almost to none.
- Car consumes too much fuel which makes me think:
Car could be tuned and running very rich; because once the car is warm, i can hear the exhaust crack and pops almost everytime the car decelerate/downshift, and ofc, i smell fuel too. Could that cause fuel smell ?
Mechanic said if canister filter did not solve the problem then its the tank need to be changed ...
What do you guys think ? Any help is appreciated.
Last edited by mAMG; Aug 6, 2016 at 04:27 PM.





