I've been to GAHH and they seem to be a very good shop. They do interiors for Porsche, Rolls Royce and BMW as well as MB. I'd give them a call and tell them your concerns.
I'm sure in 10 years your leather had faded. Any chance that the armrest is closer to the original color than your interior? Just a thought.
1994 E420, Pearl Black/Black. 2.82 rear diff., AMG front spoiler, painted lower half. SOLD
1972 & 1974 BMW 2002tii's.