I noticed a leak right at the elbow on the left (driver's side). It looks like I'm going to have to replace this line (124 830 74 96) (attached). Has anyone done this? Access to where it goes into the heater seems simple enough, but it looks like I may have to take some of the plastic cowling off at the bottom of the windshield (in front of blower motor) to get to the two lower connections between the engine and firewall. I didn't see any hose clamps down below, but the epc shows two "rubber rings" (124 832 96 93). Are these just push-on fittings? Thanks.

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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles