It's a shot in the dark, but also check two fuses placed behind the little plastic wall behind the battery. There is a little hinged cover on top of the unit with two more modern (not the typical Mercedes) type fuses inside. I don't know what they do, buy my mechanic had me check them recently as I haven't been able to get my 16 valve started for the driving season. I'll have to have it towed to his shop.

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Current:
2014 VW Tiguan SEL 4Motion 43,000 miles.

2016 Hyundai Santa Fe Sport (wife's).

Past:
2006 Jetta TDI 135,970 miles. Sold Nov. '13.
1995 E-320 Special Edition. 220,200 miles. Sold Sept. '07.
1987 190-E 16 valve. 153,000 miles. Sold Feb. '06.
1980 300-D 225,000 miles. Donated to the National Kidney Foundation.
1980 240-D manual, 297,500 miles. Totaled by inattentive driver.