I have been looking at a 05 SRT6 that has 115K+ miles on it. It’s been tuned and a smaller pulley installed. It looks very clean from the pictures, but with it being supercharged and Mercedes it makes me a little nervous.
should I be worried about longevity and upkeep of it? I know that’s a loaded question because we don’t know how it’s been treated, but looking at how clean it is I would venture to say it’s been treated relatively decent.

BTW…this is coming from someone that just inherited a 05 N/A roadster, so I’m not completely familiar with them.
If this thread needs to be moved to technical, please feel free.

Thanks for your help in advance.

 

The only way to find out is to test drive the car. Look and listen for anything that doesn't seem right. Check for leaks (the breather covers on most Crossfire models are famous for leaking, not a big deal to fix).
The Mercedes M112 engine is very reliable. Maintenance on these cars is relatively easy. I have an 06 base roadster, so I'm not totally familiar with the supercharger's maintenance. However, I do my own work on my car. Just because it has a famous German name doesn't make the engine any different than anything else, they all require gas, air and spark.
You should check into the car's maintenance history, via carfax or request the owner to provide any records they can.

 

The bottom line is spend a few bucks for an inspection at an independent European mechanic, as the car (SRT-6) is the equivalent to a Benz SLK-32. Once you get an in-depth evaluation of the car, then you'll know what to live with and what you can negotiate with (and both aren't mutually excludable). Good luck!

BTW, this forum is a wealth of information that can save you many bucks, you can also factor that in on an offer, if your able to do repairs that are needed.


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That "seems" like high mileage but forum members regularly report 200-300k miles. The original owner (owners?) could have installed a cold air intake and smaller pulley just for some additional hp. The real question is for what was the car used...street racing, drag strip, or just a fast grocery getter. Agree about 1) seeing a service history if available; 2) professional inspection by someone who knows the SLK-320 (also AMG) platform.