Originally Posted by
Bozman52
Svengoolie always has really great writeups. I actually hadn't seen that one before attempting the job for myself, so that would have been very helpful. My hoses did not look to be in amazing shape, and as they all need to be disconnected to do the job, I just planned to replace all of them. I worked with my local MB dealership parts dept to get most of the parts. The diagrams are below, with pricing and availability from the parts dept., but note that some of the hoses are no longer available. Some of my brackets/bolts were also in bad shape, so I ended up with most items from these diagrams, but it may be different for someone else depending on the condition. I've made some additional comments after each diagram that is helpful.
In this diagram, the hose you definitely want to get from MB is hose #120. It goes from the fuel filter up to the fuel tank. This hose is a different diameter at each end, so I have no idea how you would source this independently of a MB part. For hose #100, instead of paying MB an extortionate price for a meter of hose, I just purchased some 7.5mm fuel hose from a wholesale website. This hose is also the same size as the hose on the fuel damper, so if you happened to find a damper independently (and don't go with my ready to go Subaru option), then you can use the same bulk hose for #100 here and for #40 in the diagram below.
Hose #70 is just a breather/vaccum hose, and mine was still fine, so I opted not to replace this one. The hose is no longer available from MB and I didn't have a correct size hose to hand to use. However, you could easly replace this at any time in the future, as no fuel flows through it. Disregard the comment above about hose #30, as it doesn't make any sense, as all R170 SLKs were petrol. I'm not sure what the parts guy was talking about. The fuel damper + hose is what goes here anyway (part #40).
I hope this helps a bit regarding what parts you may need for hoses. I should have included this in my original post, so apologies for omitting it.
Hi, I'm the guy who does the "Svengoolie" write ups.
Thank you for the diagrams, and descriptions, they are good to have for reference.
I assume that you used high pressure clamps and that the fuel hose that you bought is rated for high pressure. When I first did my fuel pump and filter I tried regular fuel hose with worm screw style clamps.
The high pressure caused leaking, so I replaced the lines with Mercedes hose and high pressure fuel clamps (see picture below).
Cheers,
John
