My 560 SEL just turned 100k on a trip we did this weekend. Everything works great, but the cruise control seems to occasionally disengage, though it reengages on pulling the switch to resume. I have already wanted to lubricate the throttle linkage before the trip, but could not find the "Aero" hydraulic fluids specified in the manual, not even at my local airport!

I have seen other people mention ATF as a lubricant for their throttle linkage, but on was other models. Does anybody know if this is ok on the 560?

Thanks....

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

I use a substance called polylube or white lithium grease. As for your cruise the amplifier is probably bad, do a search and find a good source for a reman unit.

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euro 287
Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck

As for the cruise control disengaging, make sure your tire pressure is up, tread ware is about the same on all the tires and the balance is correct. Having a tire or a set that is different then the others will make the computer think that one or some of the tires are turning faster/slower then the others and disengage the cruise. Just follows my theory, check the simple things first before replacing parts!

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1986 190E 186K (For Sale)
(Maroon, Tan leather)
1996 C280 Sport 208K
(Brilliant Silver, Black Leather)
2002 CLK430 Sport 45K
(Brilliant Silver, Gray Leather , Birdseye Maple)

Never heard of a tire causing a sruise problem, we had abs problems on late models from low profiles that were differant sizes. Tire pressure will not affect cruise on the 124 bodies.

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euro 287
Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck

It's a 126 body. But it can't be the tires - just had all that checked out.

Again - I wonder about what would be a proper lubricant for the linkage. Is ATF ok?

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

I've used ATF and grease just to see the characteristics of each. The ATF works better.

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Jim

engatwork - Thanks for the reply. ATF it will be...

Once I know that linkage is as smooth as it should be, then I will test the cruise again. If that did not help, then I'll start checking out the amplifyer and go through the diagnostics.

On the rear light bulb issue with the cruise control - that should only affect the cruise with lights on, or with the brake pedal depressed, right? After all, with the lights off, the circuit for the bulbs is open.

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

It is the brake light bulbs that effect the cc so it should not matter whether the lights are on or off. In one of these cc threads there is discussion on where to send the amp/actuator for rebuild.

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Jim

Could someone describe how they lubricate the linkage with the ATF? Do you just place a few drops on it or ???

Thanks!

M/B sells the hydraulic fluid at the dealers. It is the same fluid used in the self-leveling system. It makes a great lube for the newer door hinges also (the ones without the grease port). It is best applied with a "needle nose" applicator so you can control the flow to a drop or so.

Thanks - got those links. Hope I don't have to go there yet...

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

Henry - Looking for a real good lubricant oil? For years now I put Duralube in a small container and use that. When you think of it - if it cuts down friction in your engine with a light coating - think what it can do for other things requiring lubrication.