SL/R230: Need advice please: 2003 SL500 vs 2007 SL550

2003
+ Cheaper price, super clean, one owner, nice color combo.
- Older motor and tranny, 1st year model.
2007
+ Newer, updated motor and tranny, glass roof.
- More money, color: black exterior with tan interior, two owners, has been in fender bender.
Last edited by vh_supra26; Mar 27, 2015 at 12:38 PM.
03s do have more bugs, and being the oldest US r230s problems are of course more apparent on them. The ABC suspension, often a source of tremendous headache and expense for owners of aging r230s, also had some revisions with '07 which supposedly improved reliability. The ABC electronics and software were also enhanced which allow for substantially faster corrections/operation - this alone improves ride quality and vehicle handling.



The 03 has 3 valve 5 liter motor with 300 hp
The 07 has 4 valve 5.5 liter motor with 390 hp
The seven speed tranny on the 07 will give you better gas mileage.
If I were you, I would make darn sure the ABC system isnt trashed, does it sink (more than a little)? Is the fluid clear green or dark?
If you can convince yourself the ABC isnt ready to give up the ghost, I would jump on it. Of course you should work on the price if possible. If you can wave the cash in their face, they usually wont let the cash out the door.
- ABC pump had to be replaced (covered by warranty after a fight)
- A/C stopped working, couldn't find leak with dye, twice ($200 x 2)
- cooling fan had to be replaced (covered by warranty, $200 deductible)
- fuel cap had to be replaced ($80)
- ABC pressure hose had to be replaced ($900)
- Now the shifter is being replaced and the alternator too ($700, alternator hopefully covered by warranty)
You won't be able to get a warranty for a 2003 model.



- ABC pump had to be replaced (covered by warranty after a fight)
- A/C stopped working, couldn't find leak with dye, twice ($200 x 2)
- cooling fan had to be replaced (covered by warranty, $200 deductible)
- fuel cap had to be replaced ($80)
- ABC pressure hose had to be replaced ($900)
- Now the shifter is being replaced and the alternator too ($700, alternator hopefully covered by warranty)
You won't be able to get a warranty for a 2003 model.
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But the black SL550 sold

Anyways, moving on. Still looking for a car. We ran across this 2004 E55 AMG. It has 22k and the dealer is asking $25k. What you you guys think.? Thanks again
Last edited by vh_supra26; Mar 29, 2015 at 01:18 PM.
The Best of Mercedes & AMG







coolant flush (15 year coolant was original)
ABC fluid flush (easy DIY and about $150 in fluid. The shelf life of the fluid is only 5 years according to the manufacturer, so this needs changed every couple of years regardless)
abc accumulators (about $600 in parts for all 4- the rubber deteriorates with age & these are what keep the system properly pressurized)
power steering fluid flush (same fluid as ABC system)
upgrade to 010 intercooler pump (if you go AMG model)
upgrade shifter mechanism from plastic to metal
swap out hydraulic top fluid (similar fluid to ABC system, but it is a kind that doesn't smell as bad in case it spills inside the car from a component going bad)
condition all seals/weather strips (use this )
transmission fluid flush/filter/plug (if you don't change the electrical plug the fluid can wick up into the transmission computer and ruin it)
crank position sensor
differential fluid change
supercharger fluid change (if AMG)
brake fluid flush (if brakes on it are more than 2 years old, which is likely given the low mileage of the car)
after about 10,000 actuations you'll have problems with the at least one top solenoid (most likely the one that latched to the windshield) or the pump. There is a place you can have everything rebuilt with upgraded components for way cheaper than replacing them with factory parts that don't last. http://www.tophydraulicsinc.com/en/21-r230-sl
It may also not be too long before you'll need to replace the engine mounts/transmission mounts/& flex discs (these go on the end of the driveshaft) as these rubber components are going to deteriorate with age & take a beating at least on the AMG model.
Of course these types of fluid changes are a good idea with any new to you car, but especially an SL of that age. You'll save a lot of headache doing that preventative maintenance on the front end. I have a friend that bought an Sl500 brand new in 2003 & hasn't done these fluid changes even though he's over 115,000 miles. I keep telling him he's got a ticking time bomb on his hands.
You'll also want to get a Star tool if you have a mercedes. It lets you diagnose any problem without having to go to the dealer. It also gives you step by step instructions on how to fix the problem (exact same thing dealers use). You can get one from shardul here on the fourm.




coolant flush (15 year coolant was original)
ABC fluid flush (easy DIY and about $150 in fluid. The shelf life of the fluid is only 5 years according to the manufacturer, so this needs changed every couple of years regardless)
abc accumulators (about $600 in parts for all 4- the rubber deteriorates with age & these are what keep the system properly pressurized)
power steering fluid flush (same fluid as ABC system)
upgrade to 010 intercooler pump (if you go AMG model)
upgrade shifter mechanism from plastic to metal
swap out hydraulic top fluid (similar fluid to ABC system, but it is a kind that doesn't smell as bad in case it spills inside the car from a component going bad)
condition all seals/weather strips (use this Amazon.com: einszett 914806 'Gummi Pflege Stift' Rubber Care Stick - 3.4 fl. oz: Automotive)
transmission fluid flush/filter/plug (if you don't change the electrical plug the fluid can wick up into the transmission computer and ruin it)
crank position sensor
differential fluid change
supercharger fluid change (if AMG)
brake fluid flush (if brakes on it are more than 2 years old, which is likely given the low mileage of the car)
after about 10,000 actuations you'll have problems with the at least one top solenoid (most likely the one that latched to the windshield) or the pump. There is a place you can have everything rebuilt with upgraded components for way cheaper than replacing them with factory parts that don't last. http://www.tophydraulicsinc.com/en/21-r230-sl
It may also not be too long before you'll need to replace the engine mounts/transmission mounts/& flex discs (these go on the end of the driveshaft) as these rubber components are going to deteriorate with age & take a beating at least on the AMG model.
Basically addressed everything I learned on this forum that could potentially leave me stranded, or improved the car.
I'm confident the car will be reliable and a joy for years with proper maintenance. Drive the supercharged version and you will never look back.



