Join Date: Jun 2018
Location: west bend, WI
Vehicle: 2002 SLK 32 AMG with full SL55 air intake system, EC TCU and ECU tunes, 65mm SC pulley
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These are the instructions i used
Removing the stock boxes-
I think that you will get the most useful info by looking closely at the "55" intake that is un-installed.
the 2 spring clips on the underside of each air box
the nipple (for the crank vent) on the rubber coupler (between drivers side air box and y-pipe)
the 2 release fingers on the y-pipe.
begin by lifting the airboxes enough to dis-engage the spring clips (start at front) ... the air tube(s) (going from air box to radiator surround) can be separated from the air box as it is lifted.
next, dis-engage the crank vent hose from the underside of the rubber coupler
now, dis-engage the y-pipe from the throttle body (manually release both fingers on the y-pipe at the same time a s you do this.
Putting in sl55 intake-
In order to make the air boxes fit properly (and securely) you need to off-set the mounting clips AND remove some small amounts of material from each air box .
use either 1/8" or 1/10" aluminum to make the off-set brackets and then secured them with 3/16" pop revets. See pics for off-set dimensions and orientation(s)
The air boxes needed to have reliefs added (used a dremel with a 1/2" sanding drum IIRC) to clear some details on the upper intake plenums. And, some material had to be removed from one of the airboxes near the oil filler cap
you will likely also want to reshape the heat shielding next to the new airbox (passenger side). see blue tape in attached photo
you can use the SLK32 (C32) front cover with light modification, but I don't recommend it as it gets in the way of regular inspection of the SC pulley.
the "55" air tubes are (much) larger. to install them, you need to remove the air-guides on either side of the radiator. ADDITIONALY, I seam to recall that one of the tubes (drivers side?) was still to big (to pass through the opening even with the air guide removed), so it had to have a slice added (from tip back to engine side of radiator support) so that the tube could be slightly collapsed to fit through.