service plan A - Mercedes Benz SLK Forum

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#1 Old 01-29-2010
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service plan A

just got my first service done today at MB. just a few questions i forgot to ask, and some personal questions to save my wallet from drying out...

but the recommended the following:
fuel filter $155
steering shock $185
brake flush $98
coolant flush $110

which do i need to get done first? i have no idea the importance of one to the other. and which could i possibly do myself? i know how to do a few things mechanically wise like change spark plug, change oil, brakes etc.... but never bled the brakes or drained coolant. any help would be appreciated thanks!
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#2 Old 01-29-2010
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A search will likely bring up some detailed info on those jobs including some photos. Brake fluid should be done every two years, coolant on your car every three years - use the proper coolant, not the green stuff. I haven't done the steering shock on my SLK yet, but it ought to be an easy job assuming it's similar to other Mercedes. Haven't done the fuel filter on mine yet, so I won't guess at that one.

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#3 Old 01-30-2010
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steering dampner 20$ online takes 30 minutes to replace
fuel filter 40$ takes about an hour to replace
brake fluid flush is easzy peazy with a motion powerbleeder. bleeder costs 50$ and fluid runs about 30$ for qt.
coolant fush is super simple. drain plug on radiator. then fill with distilled water and rad flush. run until warm then drain again. fill with distilled water and run again. then drain and refill with a 50/50 mix of m/b coolant and distilled water. run with the heater on until up to temps and check for level. add as needed to ensure all the air is bled out
done!!
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#4 Old 01-30-2010
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Agree on the pressure bleeder - those really make the job easy. Brake fluid is only about $10/quart for good quality stuff. Not sure what kind costs $30/quart - that's expensive!

Len
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#5 Old 01-30-2010
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motul blue race fluid. good for temps in excess of 500 degrees. i drag race my 32 and slowing down from 115 to 25 in short time really heats the brakes

something else to consider. i was watching a car show and they suggested using vinegar and distilled water in a 50/50 mix to flush the engine. inexpensive and non corrosive!
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#6 Old 01-30-2010
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Maybe for your use that brake fluid makes a little sense, but for the average SLK driver, a good brand of DOT4+ will be plenty good. If you run an approved synthetic oil in your engine and change it as prescribed, then there is zero need for using a flush of any kind. In fact it is prohibited by Mercedes and will void your warranty if it is discovered - slim chance, but still...Sometimes those car shows give out a lot of bad information or give out information that doesn't apply to all cars across the board.

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#7 Old 01-31-2010
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Quote:
Originally Posted by sokoloff View Post
Maybe for your use that brake fluid makes a little sense, but for the average SLK driver, a good brand of DOT4 will be plenty good. If you run an approved synthetic oil in your engine and change it as prescribed, then there is zero need for using a flush of any kind. In fact it is prohibited by Mercedes and will void your warranty if it is discovered - slim chance, but still...Sometimes those car shows give out a lot of bad information or give out information that doesn't apply to all cars across the board.

Len
you should really do some research before posting erroneous info.
m/b slk requires dot4 + fluid which has a higher boiling point than dot 4.
your owners manual req. flushing every 2 yrs
m/b manual also req. coolant replacement every 3 yrs . by using vineagar it is totally natural and will have no adverse affects.
as for a warrenty the car in question is a 99 model. highly doubt theres any warrenty.
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#8 Old 01-31-2010
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Quote:
Originally Posted by 320 dreamer View Post
you should really do some research before posting erroneous info.
m/b slk requires dot4 + fluid which has a higher boiling point than dot 4.
your owners manual req. flushing every 2 yrs
m/b manual also req. coolant replacement every 3 yrs . by using vineagar it is totally natural and will have no adverse affects.
as for a warrenty the car in question is a 99 model. highly doubt theres any warrenty.
You are correct on the DOT4+ - I should have added the "+" sign. I'll go back and edit that post.

On the flush, you weren't clear about that. You never mentioned that it was a cooling system flush. I assumed engine flush which is where my reference to not doing it and the warranty issue came in. For the cooling system, a flush certainly isn't needed every 3 years unless the condition of the coolant indicates it. If the coolant is clean and clear, then all that is needed is a drain and fill every three years (on the newer SLK's, it's every 15 years or 150,000 miles) and maybe a flush with water to get as much of the old stuff out as possible. The typical procedure for flushing the cooling system in a Mercedes is to use citric acid which is an acid as is vinegar. However, the procedure calls for the cooling system to be deoiled prior to doing the citric acid flush whether or not there is any indication of oil in the coolant. I haven't had to do this on the SLK, so I haven't taken the time to look up whether or not that's still the procedure on the SLK, but that has been the Mercedes procedure almost from the beginning of time.

Good discussion - enjoyed it.

Len
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#9 Old 01-31-2010
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the op was referring to a coolant flush which was why i didnt expand on it.
the slk has an aluminum block and heads. after 3 yrs you would be amazed at the oxidation that comes out of the engine, which is why i use the vinegar flush. its very inexpensive and easy to do. prior to the flush i take a sample have a glycol contamination test done. any m/b shop will do the test.
any oil in the system will flushed with the vinegar. then reflush with pure distilled water.
while the benz manual gives specific parameters for fluids they also initally stated the transmission fluids were lifetime in the 722.5 trans. only after getting a number of failures did they start req. a flush at 40k.
when considering the cost of replacing the parts on a benz early preventative maintenence is a cheap and easy way to prolong the life of any auto. while the car gets older the prices of the parts dont!!
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#10 Old 01-31-2010
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Quote:
Originally Posted by 320 dreamer View Post
the op was referring to a coolant flush which was why i didnt expand on it.
the slk has an aluminum block and heads. after 3 yrs you would be amazed at the oxidation that comes out of the engine, which is why i use the vinegar flush. its very inexpensive and easy to do. prior to the flush i take a sample have a glycol contamination test done. any m/b shop will do the test.
any oil in the system will flushed with the vinegar. then reflush with pure distilled water.
while the benz manual gives specific parameters for fluids they also initally stated the transmission fluids were lifetime in the 722.5 trans. only after getting a number of failures did they start req. a flush at 40k.
when considering the cost of replacing the parts on a benz early preventative maintenence is a cheap and easy way to prolong the life of any auto. while the car gets older the prices of the parts dont!!
Yeah, I was initially thinking "What the hell is he thinking - flushing his engine with water and vinegar." There are some guys that talk about pouring water into their carbs to flush their engine. I was trying to figure out how you would do that on an SLK.

The oil (there shouldn't be any in there in the first place) that is floating around in the coolant would be flushed out, but the oil that is sticking to the sides of the coolant passages won't necessarily be removed. That's why the deoil mixture is required. Mercedes makes their own product for it, but some folks just use Liquid Tide and water and it seems to work fine. Same with the citric acid. Mercedes has their own product, but you can pick it up at a pharmacy, canning store, etc. for a lot cheaper.

Let me tell you about flushing the cooling system on my ponton. The manual calls for flushing it with P3 soda, i.e. lye, to deoil it. So I bought some lye and dumped it in. The thing started to heat up, boil and bubble up - scared the hell out of me. But it apparently worked with no ill effects. Cooling system has been good for fifteen years since I did that. I won't be using lye in the SLK.

I agree on the transmission - it's the 722.6. I've got the same transmissions in my SLK and my 210 diesel. I do the transmission in the 210 every 50,000 miles. I'm not positive, but the last I heard, Mercedes required a one time only transmission fluid change at 60,000 km, i.e. 39,000 miles. Haven't heard that they now are requiring them every 39,000 or 40,000 miles? With as little mileage as I'll be putting on the SLK, I'm thinking that I might do it at ten year intervals - haven't decided on that yet. It is interesting that our transmissions are still "filled for life," but the identical transmissions in later cars require servicing the transmission. BTW, my '99 210 has a drain plug on the torque converter which makes is nice to get almost all of the old fluid out. My SLK doesn't have a torque converter drain plug. I think the torque converter drain plug was eliminated in September, 1999.

The coolant on my SLK is an every 150,000 miles or ten years. I have heard no reports yet that that interval is an issue, but I certainly am monitoring both the coolant and the traffic on lists like this one. Distilled water might be overkill too, but I do the same thing.

Sounds like we both do a bit of overkill on maintaining our cars.

Len
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#11 Old 07-26-2011
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Lye + Al = H

The H stands for Hydrogen. The Lye will eat Aluminum. If MB does indeed recommend this then I'd be very curious as to why. I use to make hydrogen balloons using Alum and Lye (Draino), they exploded very nicely....ie Hindenburg. If you're willing to flush your system with it, I'd run Sodium Bicarb (baking soda) to neutralize the Lye. I'd still flush like my engine depended on it.
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